1 files changed, 6 insertions, 1 deletions
diff --git a/libvo/vo_x11.c b/libvo/vo_x11.c
index b6804d106d..ec1bdeef71 100644
--- a/libvo/vo_x11.c
+++ b/libvo/vo_x11.c
@@ -586,7 +586,12 @@ uninit(void)
 
 static uint32_t preinit(const char *arg)
 {
-  return 0;
+    if(arg) 
+    {
+	printf("vo_x11: Unknown subdevice: %s\n",arg);
+	return ENOSYS;
+    }
+    return 0;
 }
 
 /* for runtime fullscreen switching */