diff --git a/gst/gst.c b/gst/gst.c
index aa5e8fc7b7..9d868c6065 100644
--- a/gst/gst.c
+++ b/gst/gst.c
@@ -271,6 +271,7 @@ parse_debug_list (const gchar * list)
 #endif
 
 #ifdef G_OS_WIN32
+BOOL WINAPI DllMain (HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved);
 BOOL WINAPI
 DllMain (HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
 {