diff --git a/ext/ffmpeg/gstffmpegdemux.c b/ext/ffmpeg/gstffmpegdemux.c
index 48f7798b16..39111eeb6b 100644
--- a/ext/ffmpeg/gstffmpegdemux.c
+++ b/ext/ffmpeg/gstffmpegdemux.c
@@ -1441,7 +1441,7 @@ gst_ffmpegdemux_loop (GstFFMpegDemux * demux)
   GST_BUFFER_DURATION (outbuf) = duration;
 
   /* mark keyframes */
-  if (!(pkt.flags & PKT_FLAG_KEY)) {
+  if (!(pkt.flags & AV_PKT_FLAG_KEY)) {
     GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DELTA_UNIT);
   }
 
diff --git a/ext/ffmpeg/gstffmpegmux.c b/ext/ffmpeg/gstffmpegmux.c
index 86d8c00462..f2419e7f09 100644
--- a/ext/ffmpeg/gstffmpegmux.c
+++ b/ext/ffmpeg/gstffmpegmux.c
@@ -743,7 +743,7 @@ gst_ffmpegmux_collected (GstCollectPads * pads, gpointer user_data)
     pkt.flags = 0;
 
     if (!GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT))
-      pkt.flags |= PKT_FLAG_KEY;
+      pkt.flags |= AV_PKT_FLAG_KEY;
 
     if (GST_BUFFER_DURATION_IS_VALID (buf))
       pkt.duration =