diff --git a/src/util/FFstrbuf.h b/src/util/FFstrbuf.h
index c40f411e5..2ac123352 100644
--- a/src/util/FFstrbuf.h
+++ b/src/util/FFstrbuf.h
@@ -12,7 +12,7 @@
 
 #ifdef _WIN32
     // #include <shlwapi.h>
-    __stdcall const char* StrStrIA(const char* lpFirst, const char* lpSrch);
+    __stdcall char* StrStrIA(const char* lpFirst, const char* lpSrch);
     #define strcasestr StrStrIA
 #endif