diff --git a/libavcodec/videotoolboxenc.c b/libavcodec/videotoolboxenc.c
index 7796a685c2..9f2a71b15d 100644
--- a/libavcodec/videotoolboxenc.c
+++ b/libavcodec/videotoolboxenc.c
@@ -2473,13 +2473,14 @@ static av_cold int vtenc_close(AVCodecContext *avctx)
 {
     VTEncContext *vtctx = avctx->priv_data;
 
+    pthread_cond_destroy(&vtctx->cv_sample_sent);
+    pthread_mutex_destroy(&vtctx->lock);
+
     if(!vtctx->session) return 0;
 
     VTCompressionSessionCompleteFrames(vtctx->session,
                                        kCMTimeIndefinite);
     clear_frame_queue(vtctx);
-    pthread_cond_destroy(&vtctx->cv_sample_sent);
-    pthread_mutex_destroy(&vtctx->lock);
     CFRelease(vtctx->session);
     vtctx->session = NULL;