diff --git a/libmpcodecs/vd_qtvideo.c b/libmpcodecs/vd_qtvideo.c
index e2671791fe..1d8f405b12 100644
--- a/libmpcodecs/vd_qtvideo.c
+++ b/libmpcodecs/vd_qtvideo.c
@@ -106,6 +106,7 @@ static int init(sh_video_t *sh){
     CodecInfo cinfo;	// for ImageCodecGetCodecInfo()
     ImageSubCodecDecompressCapabilities icap; // for ImageCodecInitialize()
 
+    codec_inited = 0;
 #ifdef MACOSX
     EnterMovies();
 #else