diff --git a/libretro-common/include/compat/fopen_utf8.h b/libretro-common/include/compat/fopen_utf8.h
index 583b558a26..67cc289aa6 100644
--- a/libretro-common/include/compat/fopen_utf8.h
+++ b/libretro-common/include/compat/fopen_utf8.h
@@ -1,9 +1,14 @@
+#ifndef __FOPEN_UTF8_H
+#define __FOPEN_UTF8_H
+
 #include <stdio.h>
+
 #ifdef _WIN32
-/* defined to error rather than fopen_utf8, to make clear to everyone reading the code that not worrying about utf16 is fine */
+/* defined to error rather than fopen_utf8, to make it clear to everyone reading the code that not worrying about utf16 is fine */
 /* TODO: enable */
 /* #define fopen (use fopen_utf8 instead) */
 FILE* fopen_utf8(const char * filename, const char * mode);
 #else
 #define fopen_utf8 fopen
 #endif
+#endif