diff --git a/game_re/gh_fix/r3_windowProc.cxx b/game_re/gh_fix/r3_windowProc.cxx
index a422a675..21cb071d 100644
--- a/game_re/gh_fix/r3_windowProc.cxx
+++ b/game_re/gh_fix/r3_windowProc.cxx
@@ -8,7 +8,7 @@ undefined r3_windowUnlockCursor(void); // 004013a0 // r3_windowUnlockCursor
 undefined FUN_00401320(void); // 00401320 // FUN_00401320
 
 // 004025e0
-long CALLBACK r3_windowProc(HWND hwnd,UINT uMsg,WPARAM wParam,LPARAM lParam)
+long __stdcall r3_windowProc(HWND hwnd,UINT uMsg,WPARAM wParam,LPARAM lParam)
 
 {
   long lVar1;