diff --git a/doc/examples/decode_video.c b/doc/examples/decode_video.c
index 159765360f92bf6b8c7524c79a0b096d1e944a1a..dd1177b8b0c0bf175cf1a51bea58a77aa23b3f65 100644
--- a/doc/examples/decode_video.c
+++ b/doc/examples/decode_video.c
@@ -79,7 +79,7 @@ static int decode_write_frame(const char *outfilename, AVCodecContext *avctx,
 int main(int argc, char **argv)
 {
     const char *filename, *outfilename;
-    AVCodec *codec;
+    const AVCodec *codec;
     AVCodecContext *c= NULL;
     int frame_count;
     FILE *f;