diff --git a/src/smackw32/include/smackw32/smackw32.h b/src/smackw32/include/smackw32/smackw32.h
index 46713ac7..c64e278f 100644
--- a/src/smackw32/include/smackw32/smackw32.h
+++ b/src/smackw32/include/smackw32/smackw32.h
@@ -45,6 +45,7 @@ typedef struct SmackTag {
 
     // added by dethrace
     void* smk_handle; // opaque pointer to the libsmacker instance
+    void *f; // opaque file pointer
     tAudioBackend_stream* audio_stream;
 } Smack;
 
diff --git a/src/smackw32/smackw32.c b/src/smackw32/smackw32.c
index 8722deb7..b33c79c6 100644
--- a/src/smackw32/smackw32.c
+++ b/src/smackw32/smackw32.c
@@ -7,6 +7,7 @@
 #include <string.h>
 
 #include "harness/hooks.h"
+#include "harness/os.h"
 #include "harness/trace.h"
 
 // lib/libsmacker
@@ -27,9 +28,15 @@ Smack* SmackOpen(const char* name, uint32_t flags, uint32_t extrabuf) {
     double microsecs_per_frame;
     Smack* smack;
     double fps;
+    FILE *f = NULL;
 
-    smk smk_handle = smk_open_file(name, SMK_MODE_MEMORY);
+    f = OS_fopen(name, "rb");
+    if (f == NULL) {
+        return NULL;
+    }
+    smk smk_handle = smk_open_filepointer(f, SMK_MODE_MEMORY);
     if (smk_handle == NULL) {
+        fclose(f);
         return NULL;
     }
 
@@ -41,6 +48,8 @@ Smack* SmackOpen(const char* name, uint32_t flags, uint32_t extrabuf) {
     // smk_handle is added to hold a pointer to the underlying libsmacker instance
     smack->smk_handle = smk_handle;
 
+    smack->f = f;
+
     smk_info_all(smk_handle, NULL, &smack->Frames, &microsecs_per_frame);
     fps = 1000000.0 / microsecs_per_frame;
     smack->MSPerFrame = (unsigned long)((1 / fps) * 1000);
@@ -128,5 +137,6 @@ void SmackClose(Smack* smack) {
     }
 
     smk_close(smack->smk_handle);
+    // libsmacker closes file, no need to do `fclose(smack->f)`
     free(smack);
 }