diff --git a/doc/examples/muxing.c b/doc/examples/muxing.c
index cd734f8b37..ea5c78e289 100644
--- a/doc/examples/muxing.c
+++ b/doc/examples/muxing.c
@@ -535,7 +535,7 @@ int main(int argc, char **argv)
     AVOutputFormat *fmt;
     AVFormatContext *oc;
     AVCodec *audio_codec, *video_codec;
-    int flush, ret;
+    int ret;
     int have_video = 0, have_audio = 0;
     int encode_video = 0, encode_audio = 0;