diff --git a/reactos/apps/tests/gditest/gditest.c b/reactos/apps/tests/gditest/gditest.c
index 116d4d04a79..3e3a5efea59 100644
--- a/reactos/apps/tests/gditest/gditest.c
+++ b/reactos/apps/tests/gditest/gditest.c
@@ -4,7 +4,7 @@
 
 #include <windows.h>
 
-extern VOID STDCALL GdiDllInitialize(PVOID hInstance, ULONG Event, PVOID Reserved);
+extern BOOL STDCALL GdiDllInitialize(PVOID hInstance, ULONG Event, PVOID Reserved);
 
 int main (void)
 {