diff --git a/fftools/ffmpeg_dec.c b/fftools/ffmpeg_dec.c
index 521bd657f3..66c58c1c3c 100644
--- a/fftools/ffmpeg_dec.c
+++ b/fftools/ffmpeg_dec.c
@@ -1018,6 +1018,7 @@ static int decoder_thread(void *arg)
 
 finish:
     dec_thread_uninit(&dt);
+    avcodec_free_context(&dp->dec_ctx);
 
     return ret;
 }