diff --git a/ffmpeg.c b/ffmpeg.c
index 86a0960242..1f4277c4c2 100644
--- a/ffmpeg.c
+++ b/ffmpeg.c
@@ -527,6 +527,8 @@ static void ffmpeg_cleanup(int ret)
         av_freep(&ost->audio_channels_map);
         ost->audio_channels_mapped = 0;
 
+        av_dict_free(&ost->sws_dict);
+
         avcodec_free_context(&ost->enc_ctx);
 
         av_freep(&output_streams[i]);