diff --git a/utils/video-viewer.cc b/utils/video-viewer.cc
index 2b86e0bed..b89ee7ec0 100644
--- a/utils/video-viewer.cc
+++ b/utils/video-viewer.cc
@@ -292,7 +292,7 @@ int main(int argc, char *argv[]) {
       // Find the first video stream
       int videoStream = -1;
       AVCodecParameters *codec_parameters = NULL;
-      AVCodec *av_codec = NULL;
+      const AVCodec *av_codec = NULL;
       for (int i = 0; i < (int)format_context->nb_streams; ++i) {
         codec_parameters = format_context->streams[i]->codecpar;
         av_codec = avcodec_find_decoder(codec_parameters->codec_id);