diff --git a/include/macros.h b/include/macros.h
index 67fb52c759..9ab7a94594 100644
--- a/include/macros.h
+++ b/include/macros.h
@@ -77,4 +77,6 @@
 #define _NS(x, y) x ## _ ## y
 #define NS(x, y) _NS(x, y)
 
+#define ASCII_TO_U32(a, b, c, d) ((u32)((a << 24) | (b << 16) | (c << 8) | (d << 0)))
+
 #endif
diff --git a/src/code_1060_len_310.c b/src/code_1060_len_310.c
index 90c815d46b..44a8397aee 100644
--- a/src/code_1060_len_310.c
+++ b/src/code_1060_len_310.c
@@ -1,13 +1,11 @@
 #include "common.h"
 
-#define U32_CHAR_LITERAL(a, b, c, d) ((u32)((a << 24) | (b << 16) | (c << 8) | (d << 0)))
-
 void func_80025C60(void) {
     OSPiHandle** handle = &carthandle;
 
     osEPiWriteIo(*handle, 0xB3FF0014, 0);
     osEPiWriteIo(*handle, 0xB3FF0004, 0);
-    osEPiWriteIo(*handle, 0xB3FF0000, U32_CHAR_LITERAL('I', 'S', '6', '4'));
+    osEPiWriteIo(*handle, 0xB3FF0000, ASCII_TO_U32('I', 'S', '6', '4'));
 }
 
 INCLUDE_ASM(s32, "code_1060_len_310", func_80025CC0);