diff --git a/windows/win.c b/windows/win.c
index c5d910d212d..e2e292ae9f9 100644
--- a/windows/win.c
+++ b/windows/win.c
@@ -1689,6 +1689,7 @@ HWND WINAPI GetDesktopWindow(void)
     if (pWndDesktop) return pWndDesktop->hwndSelf;
     ERR_(win)( "You need the -desktop option when running with native USER\n" );
     ExitProcess(1);
+    return 0;
 }
 
 
diff --git a/windows/x11drv/wineclipsrv.c b/windows/x11drv/wineclipsrv.c
index 97ff7a71b59..8285ae9e586 100644
--- a/windows/x11drv/wineclipsrv.c
+++ b/windows/x11drv/wineclipsrv.c
@@ -189,7 +189,7 @@ void TextOut(Window win, GC gc, char *pStr);
 void getGC(Window win, GC *gc);
 
 
-void main(int argc, char **argv)
+int main(int argc, char **argv)
 {
     XEvent event;