diff --git a/common/rfb/H264LibavDecoderContext.cxx b/common/rfb/H264LibavDecoderContext.cxx
index 885caf9dfa..8489c70f4d 100644
--- a/common/rfb/H264LibavDecoderContext.cxx
+++ b/common/rfb/H264LibavDecoderContext.cxx
@@ -99,6 +99,7 @@ void H264LibavDecoderContext::freeCodec() {
   avcodec_free_context(&avctx);
   av_frame_free(&rgbFrame);
   av_frame_free(&frame);
+  sws_freeContext(sws);
   free(h264WorkBuffer);
   initialized = false;
 }