diff --git a/include/JSystem/J2DGraph/J2DPrint.h b/include/JSystem/J2DGraph/J2DPrint.h
index dfc68a463b6..fe2b1698238 100644
--- a/include/JSystem/J2DGraph/J2DPrint.h
+++ b/include/JSystem/J2DGraph/J2DPrint.h
@@ -3,7 +3,7 @@
 
 #include "JSystem/J2DGraph/J2DTextBox.h"
 #include "JSystem/JUtility/TColor.h"
-#include "MSL_C/MSL_Common/Src/printf.h"
+#include "Runtime.PPCEABI.H/__va_arg.h"
 #include "dolphin/types.h"
 
 class J2DPrint {
diff --git a/include/MSL_C/MSL_Common/Src/ansi_files.h b/include/MSL_C/MSL_Common/Src/ansi_files.h
index 56573407cc1..a5d74cf21f0 100644
--- a/include/MSL_C/MSL_Common/Src/ansi_files.h
+++ b/include/MSL_C/MSL_Common/Src/ansi_files.h
@@ -104,9 +104,9 @@ typedef struct _FILE {
 } FILE;
 
 typedef struct _files {
-    FILE stdin;
-    FILE stdout;
-    FILE stderr;
+    FILE _stdin;
+    FILE _stdout;
+    FILE _stderr;
     FILE empty;
 } files;
 
diff --git a/include/MSL_C/stdio.h b/include/MSL_C/stdio.h
new file mode 100644
index 00000000000..135bd9314ee
--- /dev/null
+++ b/include/MSL_C/stdio.h
@@ -0,0 +1,14 @@
+#ifndef MSL_STDIO_H_
+#define MSL_STDIO_H_
+
+#include "MSL_C/MSL_Common/Src/FILE_POS.h"
+#include "MSL_C/MSL_Common/Src/char_io.h"
+#include "MSL_C/MSL_Common/Src/direct_io.h"
+#include "MSL_C/MSL_Common/Src/file_io.h"
+#include "MSL_C/MSL_Common/Src/printf.h"
+
+#define stdin (&__files._stdin)
+#define stdout (&__files._stdout)
+#define stderr (&__files._stderr)
+
+#endif
diff --git a/include/MSL_C/string.h b/include/MSL_C/string.h
index c1105257c8c..21cb9c72749 100644
--- a/include/MSL_C/string.h
+++ b/include/MSL_C/string.h
@@ -1,27 +1,23 @@
 #ifndef MSL_STRING_H_
 #define MSL_STRING_H_
 
-#include "Runtime.PPCEABI.H/__va_arg.h"
+#include "MSL_C/MSL_Common/Src/stddef.h"
 
 
 // TODO: move to MSL_C/
 extern "C" {
-void memcpy(void*, const void*, s32);
-void* memset(void* dest, int ch, u32 count);
+void memcpy(void*, const void*, size_t);
+void* memset(void* dest, int ch, size_t count);
 char* strrchr(const char* s, int c);
 char* strchr(const char* s, int c);
-int strncmp(const char* s1, const char* s2, u32 n);
+int strncmp(const char* s1, const char* s2, size_t n);
 int strcmp(const char* s1, const char* s2);
 int stricmp(const char*, const char*);
 char* strcat(char* dest, const char* source);
-char* strncpy(char* dest, const char* source, u32 n);
+char* strncpy(char* dest, const char* source, size_t n);
 char* strcpy(char* dest, const char* source);
-u32 strlen(const char* s);
+size_t strlen(const char* s);
 int tolower(int);
-int sprintf(char*, const char*, ...);
-int printf(const char*, ...);
-int snprintf(char*, u32, const char*, ...);
-size_t vsnprintf(char* buffer, size_t buffer_size, const char* format, va_list args);
 }
 
 #endif
\ No newline at end of file
diff --git a/include/d/save/d_save.h b/include/d/save/d_save.h
index 334cdcc389a..46d8d8dc287 100644
--- a/include/d/save/d_save.h
+++ b/include/d/save/d_save.h
@@ -1,7 +1,6 @@
 #ifndef D_SAVE_D_SAVE_H
 #define D_SAVE_D_SAVE_H
 
-#include "MSL_C/MSL_Common/Src/printf.h"
 #include "MSL_C/MSL_Common/Src/string.h"
 #include "SSystem/SComponent/c_xyz.h"
 #include "dolphin/os/OS.h"
diff --git a/include/m_Do/m_Do_printf.h b/include/m_Do/m_Do_printf.h
index ac80fa30503..9a89912e971 100644
--- a/include/m_Do/m_Do_printf.h
+++ b/include/m_Do/m_Do_printf.h
@@ -1,8 +1,6 @@
 #ifndef M_DO_M_DO_PRINTF_H
 #define M_DO_M_DO_PRINTF_H
 
-#include "MSL_C/MSL_Common/Src/char_io.h"
-#include "MSL_C/MSL_Common/Src/printf.h"
 #include "Runtime.PPCEABI.H/__va_arg.h"
 #include "dolphin/types.h"
 #include "m_Do/m_Do_main.h"
diff --git a/libs/JSystem/J2DGraph/J2DPrint.cpp b/libs/JSystem/J2DGraph/J2DPrint.cpp
index b523d89d887..6dcde380363 100644
--- a/libs/JSystem/J2DGraph/J2DPrint.cpp
+++ b/libs/JSystem/J2DGraph/J2DPrint.cpp
@@ -4,6 +4,7 @@
 //
 
 #include "JSystem/J2DGraph/J2DPrint.h"
+#include "MSL_C/stdio.h"
 #include "dol2asm.h"
 #include "dolphin/types.h"
 
diff --git a/libs/JSystem/JKernel/JKRThread.cpp b/libs/JSystem/JKernel/JKRThread.cpp
index 7235ed8799b..f801dd206fb 100644
--- a/libs/JSystem/JKernel/JKRThread.cpp
+++ b/libs/JSystem/JKernel/JKRThread.cpp
@@ -7,7 +7,7 @@
 #include "JSystem/JKernel/JKRExpHeap.h"
 #include "JSystem/JUtility/JUTAssert.h"
 #include "JSystem/JUtility/JUTConsole.h"
-#include "MSL_C/MSL_Common/Src/printf.h"
+#include "MSL_C/stdio.h"
 #include "dol2asm.h"
 
 /* 8043428C-80434298 060FAC 000C+00 5/6 0/0 0/0 .bss             sThreadList__9JKRThread */
diff --git a/libs/JSystem/JUtility/JUTConsole.cpp b/libs/JSystem/JUtility/JUTConsole.cpp
index f104b08f59d..dea05eb4dc4 100644
--- a/libs/JSystem/JUtility/JUTConsole.cpp
+++ b/libs/JSystem/JUtility/JUTConsole.cpp
@@ -8,7 +8,7 @@
 #include "JSystem/JKernel/JKRHeap.h"
 #include "JSystem/JUtility/JUTDirectPrint.h"
 #include "JSystem/JUtility/JUTVideo.h"
-#include "MSL_C/MSL_Common/Src/printf.h"
+#include "MSL_C/stdio.h"
 #include "dol2asm.h"
 
 //
diff --git a/libs/JSystem/JUtility/JUTDbPrint.cpp b/libs/JSystem/JUtility/JUTDbPrint.cpp
index facc851fd44..fc03e639a37 100644
--- a/libs/JSystem/JUtility/JUTDbPrint.cpp
+++ b/libs/JSystem/JUtility/JUTDbPrint.cpp
@@ -6,8 +6,7 @@
 #include "JSystem/JUtility/JUTDbPrint.h"
 #include "JSystem/J2DGraph/J2DOrthoGraph.h"
 #include "JSystem/JUtility/JUTVideo.h"
-#include "MSL_C/MSL_Common/Src/printf.h"
-#include "MSL_C/MSL_Common/Src/string.h"
+#include "MSL_C/stdio.h"
 
 /* 802E0148-802E0190 2DAA88 0048+00 1/1 0/0 0/0 .text __ct__10JUTDbPrintFP7JUTFontP7JKRHeap */
 JUTDbPrint::JUTDbPrint(JUTFont* pFont, JKRHeap* pHeap) {
diff --git a/libs/JSystem/JUtility/JUTDirectPrint.cpp b/libs/JSystem/JUtility/JUTDirectPrint.cpp
index ba56b7f3bea..717e936eaff 100644
--- a/libs/JSystem/JUtility/JUTDirectPrint.cpp
+++ b/libs/JSystem/JUtility/JUTDirectPrint.cpp
@@ -4,7 +4,7 @@
 //
 
 #include "JSystem/JUtility/JUTDirectPrint.h"
-#include "MSL_C/MSL_Common/Src/printf.h"
+#include "MSL_C/stdio.h"
 #include "Runtime.PPCEABI.H/__va_arg.h"
 #include "dol2asm.h"
 #include "dolphin/os/OSCache.h"
diff --git a/libs/JSystem/JUtility/JUTException.cpp b/libs/JSystem/JUtility/JUTException.cpp
index bb6b89b20b4..c949afb07d7 100644
--- a/libs/JSystem/JUtility/JUTException.cpp
+++ b/libs/JSystem/JUtility/JUTException.cpp
@@ -8,7 +8,7 @@
 #include "JSystem/JUtility/JUTDirectFile.h"
 #include "JSystem/JUtility/JUTDirectPrint.h"
 #include "MSL_C/MSL_Common/Src/float.h"
-#include "MSL_C/MSL_Common/Src/printf.h"
+#include "MSL_C/stdio.h"
 #include "Runtime.PPCEABI.H/__va_arg.h"
 #include "dol2asm.h"
 
diff --git a/libs/MSL_C/MSL_Common/Src/ansi_files.c b/libs/MSL_C/MSL_Common/Src/ansi_files.c
index 931435b2de7..9e3506a4fcb 100644
--- a/libs/MSL_C/MSL_Common/Src/ansi_files.c
+++ b/libs/MSL_C/MSL_Common/Src/ansi_files.c
@@ -47,7 +47,7 @@ extern files __files = {
         __write_console,
         __close_console,
         NULL,
-        &__files.stdout,
+        &__files._stdout,
     },
     {
         1,
@@ -79,7 +79,7 @@ extern files __files = {
         __write_console,
         __close_console,
         NULL,
-        &__files.stderr,
+        &__files._stderr,
     },
     {
         2,
@@ -121,7 +121,7 @@ extern files __files = {
 
 /* 8036307C-80363124 35D9BC 00A8+00 0/0 1/1 0/0 .text            __close_all */
 void __close_all(void) {
-    FILE* file = &__files.stdin;
+    FILE* file = &__files._stdin;
     FILE* last_file;
 
     __begin_critical_region(2);
@@ -150,7 +150,7 @@ void __close_all(void) {
 /* 8036300C-8036307C 35D94C 0070+00 0/0 2/2 0/0 .text            __flush_all */
 unsigned int __flush_all(void) {
     unsigned int ret = 0;
-    FILE* file = &__files.stdin;
+    FILE* file = &__files._stdin;
 
     while (file) {
         if (file->file_mode.file_kind != 0 && fflush(file)) {
diff --git a/rel/d/a/d_a_set_bgobj/d_a_set_bgobj.cpp b/rel/d/a/d_a_set_bgobj/d_a_set_bgobj.cpp
index 5d315e13d45..3006ed98826 100644
--- a/rel/d/a/d_a_set_bgobj/d_a_set_bgobj.cpp
+++ b/rel/d/a/d_a_set_bgobj/d_a_set_bgobj.cpp
@@ -4,6 +4,7 @@
  */
 
 #include "rel/d/a/d_a_set_bgobj/d_a_set_bgobj.h"
+#include "MSL_C/stdio.h"
 #include "d/d_procname.h"
 
 /* 80485F00-80485F0C 000000 0009+03 1/1 0/0 0/0 .rodata          l_specName */
diff --git a/src/DynamicLink.cpp b/src/DynamicLink.cpp
index 49ee373ac3e..0ce1ce732ba 100644
--- a/src/DynamicLink.cpp
+++ b/src/DynamicLink.cpp
@@ -6,7 +6,7 @@
 #include "DynamicLink.h"
 #include "JSystem/JKernel/JKRDvdRipper.h"
 #include "JSystem/JUtility/JUTConsole.h"
-#include "MSL_C/MSL_Common/Src/printf.h"
+#include "MSL_C/stdio.h"
 #include "dol2asm.h"
 #include "dolphin/os/OS.h"
 #include "dolphin/types.h"
diff --git a/src/d/com/d_com_inf_game.cpp b/src/d/com/d_com_inf_game.cpp
index dfe644d4817..aaf065545a5 100644
--- a/src/d/com/d_com_inf_game.cpp
+++ b/src/d/com/d_com_inf_game.cpp
@@ -4,6 +4,7 @@
 //
 
 #include "d/com/d_com_inf_game.h"
+#include "MSL_C/stdio.h"
 #include "d/d_item.h"
 #include "d/d_procname.h"
 #include "d/d_timer.h"
diff --git a/src/d/com/d_com_static.cpp b/src/d/com/d_com_static.cpp
index a97555c0598..afa3571b5b2 100644
--- a/src/d/com/d_com_static.cpp
+++ b/src/d/com/d_com_static.cpp
@@ -4,6 +4,7 @@
 //
 
 #include "d/com/d_com_static.h"
+#include "MSL_C/stdio.h"
 #include "d/com/d_com_inf_game.h"
 #include "d/d_demo.h"
 #include "dol2asm.h"
diff --git a/src/d/d_name.cpp b/src/d/d_name.cpp
index 7ed8aed09a2..69b1acbee4a 100644
--- a/src/d/d_name.cpp
+++ b/src/d/d_name.cpp
@@ -5,6 +5,7 @@
 
 #include "d/d_name.h"
 #include "JSystem/J2DGraph/J2DAnmLoader.h"
+#include "MSL_C/stdio.h"
 #include "dol2asm.h"
 #include "dolphin/types.h"
 #include "f_op/f_op_msg_mng.h"
diff --git a/src/d/d_resorce.cpp b/src/d/d_resorce.cpp
index 4476c87e113..59e5e98dcd5 100644
--- a/src/d/d_resorce.cpp
+++ b/src/d/d_resorce.cpp
@@ -13,6 +13,7 @@
 #include "JSystem/J3DGraphLoader/J3DModelLoader.h"
 #include "JSystem/JKernel/JKRSolidHeap.h"
 #include "MSL_C/MSL_Common/Src/extras.h"
+#include "MSL_C/stdio.h"
 #include "d/com/d_com_inf_game.h"
 #include "dol2asm.h"
 #include "dolphin/mtx/mtx.h"
diff --git a/src/d/d_stage.cpp b/src/d/d_stage.cpp
index 8d4dab58e99..77e074e3cba 100644
--- a/src/d/d_stage.cpp
+++ b/src/d/d_stage.cpp
@@ -5,6 +5,7 @@
 
 #include "d/d_stage.h"
 #include "JSystem/JKernel/JKRAramArchive.h"
+#include "MSL_C/stdio.h"
 #include "SSystem/SComponent/c_malloc.h"
 #include "d/com/d_com_inf_game.h"
 #include "d/com/d_com_static.h"
diff --git a/src/d/event/d_event_manager.cpp b/src/d/event/d_event_manager.cpp
index 2127d52404d..5764650480c 100644
--- a/src/d/event/d_event_manager.cpp
+++ b/src/d/event/d_event_manager.cpp
@@ -5,6 +5,7 @@
 
 #include "d/event/d_event_manager.h"
 #include "SSystem/SComponent/c_math.h"
+#include "MSL_C/stdio.h"
 #include "Z2AudioLib/Z2AudioMgr.h"
 #include "d/com/d_com_inf_game.h"
 #include "d/d_camera.h"
diff --git a/src/d/file/d_file_sel_info.cpp b/src/d/file/d_file_sel_info.cpp
index d563d8d7692..c8a834516f2 100644
--- a/src/d/file/d_file_sel_info.cpp
+++ b/src/d/file/d_file_sel_info.cpp
@@ -4,6 +4,7 @@
 //
 
 #include "d/file/d_file_sel_info.h"
+#include "MSL_C/stdio.h"
 #include "dol2asm.h"
 #include "dolphin/types.h"
 
diff --git a/src/d/menu/d_menu_save.cpp b/src/d/menu/d_menu_save.cpp
index e673b7a13e9..d3a970f09dd 100644
--- a/src/d/menu/d_menu_save.cpp
+++ b/src/d/menu/d_menu_save.cpp
@@ -5,6 +5,7 @@
 
 #include "d/menu/d_menu_save.h"
 #include "JSystem/J2DGraph/J2DAnmLoader.h"
+#include "MSL_C/stdio.h"
 #include "d/com/d_com_inf_game.h"
 #include "d/file/d_file_sel_info.h"
 #include "d/file/d_file_sel_warning.h"
diff --git a/src/d/msg/d_msg_class.cpp b/src/d/msg/d_msg_class.cpp
index e1d4cff6cbb..cbd403363bf 100644
--- a/src/d/msg/d_msg_class.cpp
+++ b/src/d/msg/d_msg_class.cpp
@@ -4,6 +4,7 @@
 //
 
 #include "d/msg/d_msg_class.h"
+#include "MSL_C/stdio.h"
 #include "d/com/d_com_inf_game.h"
 #include "d/msg/d_msg_object.h"
 #include "d/msg/d_msg_unit.h"
diff --git a/src/d/msg/d_msg_object.cpp b/src/d/msg/d_msg_object.cpp
index aa170fde24c..6d50d3ae35d 100644
--- a/src/d/msg/d_msg_object.cpp
+++ b/src/d/msg/d_msg_object.cpp
@@ -6,6 +6,7 @@
 #include "d/msg/d_msg_object.h"
 #include "d/msg/d_msg_out_font.h"
 #include "JSystem/JGadget/binary.h"
+#include "MSL_C/stdio.h"
 #include "dol2asm.h"
 #include "dolphin/types.h"
 
diff --git a/src/d/msg/d_msg_unit.cpp b/src/d/msg/d_msg_unit.cpp
index bdf5169a5fd..bea422bea49 100644
--- a/src/d/msg/d_msg_unit.cpp
+++ b/src/d/msg/d_msg_unit.cpp
@@ -4,6 +4,7 @@
 //
 
 #include "d/msg/d_msg_unit.h"
+#include "MSL_C/stdio.h"
 #include "dol2asm.h"
 #include "d/kankyo/d_kankyo.h"
 #include "d/meter/d_meter2_info.h"
diff --git a/src/d/particle/d_particle.cpp b/src/d/particle/d_particle.cpp
index a743aa39105..349f823e042 100644
--- a/src/d/particle/d_particle.cpp
+++ b/src/d/particle/d_particle.cpp
@@ -4,6 +4,7 @@
 //
 
 #include "d/particle/d_particle.h"
+#include "MSL_C/stdio.h"
 #include "d/com/d_com_inf_game.h"
 #include "dol2asm.h"
 #include "dolphin/types.h"
diff --git a/src/d/s/d_s_room.cpp b/src/d/s/d_s_room.cpp
index 123607dee64..a0c978719bd 100644
--- a/src/d/s/d_s_room.cpp
+++ b/src/d/s/d_s_room.cpp
@@ -4,6 +4,7 @@
 //
 
 #include "d/s/d_s_room.h"
+#include "MSL_C/stdio.h"
 #include "d/com/d_com_inf_game.h"
 #include "d/d_procname.h"
 #include "d/s/d_s_play.h"
diff --git a/src/d/save/d_save.cpp b/src/d/save/d_save.cpp
index 23daffdd8cf..d4dc037a859 100644
--- a/src/d/save/d_save.cpp
+++ b/src/d/save/d_save.cpp
@@ -5,6 +5,7 @@
 
 #include "d/save/d_save.h"
 #include "d/save/d_save_init.h"
+#include "MSL_C/stdio.h"
 #include "Z2AudioLib/Z2AudioMgr.h"
 #include "d/com/d_com_inf_game.h"
 #include "d/meter/d_meter2_info.h"
diff --git a/src/m_Do/m_Do_MemCardRWmng.cpp b/src/m_Do/m_Do_MemCardRWmng.cpp
index 4e1bedc7db8..3dbd01c42b8 100644
--- a/src/m_Do/m_Do_MemCardRWmng.cpp
+++ b/src/m_Do/m_Do_MemCardRWmng.cpp
@@ -4,8 +4,7 @@
  */
 
 #include "m_Do/m_Do_MemCardRWmng.h"
-#include "MSL_C/MSL_Common/Src/printf.h"
-#include "MSL_C/MSL_Common/Src/string.h"
+#include "MSL_C/stdio.h"
 #include "d/com/d_com_inf_game.h"
 #include "dol2asm.h"
 #include "dolphin/types.h"
diff --git a/src/m_Do/m_Do_ext.cpp b/src/m_Do/m_Do_ext.cpp
index 598019f2479..70f01ca0f15 100644
--- a/src/m_Do/m_Do_ext.cpp
+++ b/src/m_Do/m_Do_ext.cpp
@@ -10,6 +10,7 @@
 #include "JSystem/JKernel/JKRAssertHeap.h"
 #include "JSystem/JKernel/JKRExpHeap.h"
 #include "JSystem/JMath/JMath.h"
+#include "MSL_C/stdio.h"
 #include "MSL_C/string.h"
 #include "SSystem/SComponent/c_xyz.h"
 #include "SSystem/SComponent/c_lib.h"
diff --git a/src/m_Do/m_Do_printf.cpp b/src/m_Do/m_Do_printf.cpp
index 4b61d7155df..ce5b2b8ea8b 100644
--- a/src/m_Do/m_Do_printf.cpp
+++ b/src/m_Do/m_Do_printf.cpp
@@ -4,13 +4,13 @@
  */
 
 #include "m_Do/m_Do_printf.h"
+#include "MSL_C/stdio.h"
 #include "Runtime.PPCEABI.H/__va_arg.h"
 #include "dol2asm.h"
 #include "dolphin/os/OS.h"
 #include "dolphin/types.h"
 #include "m_Do/m_Do_ext.h"
 #include "dolphin/base/PPCArch.h"
-#include "MSL_C/MSL_Common/Src/file_io.h"
 
 /* 80450B98-80450B9C -00001 0004+00 0/0 6/6 0/0 .sbss            None */
 u8 __OSReport_disable;
@@ -37,7 +37,7 @@ asm void OSSwitchFiberEx(u32 param_0, u32 param_1, u32 param_2, u32 param_3, u32
 
 /* 800067C8-800067F4 001108 002C+00 3/3 0/0 0/0 .text            my_PutString__FPCc */
 void my_PutString(const char* string) {
-    fputs(string, &__files.stdout);
+    fputs(string, stdout);
 }
 
 /* 800067F4-80006814 001134 0020+00 3/3 0/0 0/0 .text OSVAttention__FPCcP16__va_list_struct */
@@ -178,7 +178,7 @@ void OSReport_FatalError(char* fmt, ...) {
     OSVAttention(fmt, args);
     my_PutString("***** FATAL ERROR *****\n\x1B[m");
     OSReportForceEnableOff();
-    fflush(&__files.stdout);
+    fflush(stdout);
     print_errors++;
 
     va_end(args);
@@ -195,7 +195,7 @@ void OSReport_Error(char* fmt, ...) {
         OSVReport(fmt, args);
         my_PutString("\x1B[m");
         OSReportForceEnableOff();
-        fflush(&__files.stdout);
+        fflush(stdout);
         va_end(args);
     }
 }
@@ -211,7 +211,7 @@ void OSReport_Warning(char* fmt, ...) {
         OSVAttention(fmt, args);
         my_PutString("\x1B[m");
         OSReportForceEnableOff();
-        fflush(&__files.stdout);
+        fflush(stdout);
         va_end(args);
     }
 }
diff --git a/src/msg/scrn/d_msg_scrn_explain.cpp b/src/msg/scrn/d_msg_scrn_explain.cpp
index 0a2981c7d0b..5da4c77dbb7 100644
--- a/src/msg/scrn/d_msg_scrn_explain.cpp
+++ b/src/msg/scrn/d_msg_scrn_explain.cpp
@@ -4,6 +4,7 @@
 //
 
 #include "msg/scrn/d_msg_scrn_explain.h"
+#include "MSL_C/stdio.h"
 #include "dol2asm.h"
 #include "dolphin/types.h"
 
diff --git a/src/msg/scrn/d_msg_scrn_light.cpp b/src/msg/scrn/d_msg_scrn_light.cpp
index ea30a183f94..2ab19493244 100644
--- a/src/msg/scrn/d_msg_scrn_light.cpp
+++ b/src/msg/scrn/d_msg_scrn_light.cpp
@@ -4,6 +4,7 @@
 //
 
 #include "msg/scrn/d_msg_scrn_light.h"
+#include "MSL_C/stdio.h"
 #include "dol2asm.h"
 #include "dolphin/types.h"