diff --git a/doc/examples/decode_video.c b/doc/examples/decode_video.c
index 20d11dae4e6847fe4900c3678a28dec1a561c52a..4036dbe3605d3a715bedc141df44b58bab571f3b 100644
--- a/doc/examples/decode_video.c
+++ b/doc/examples/decode_video.c
@@ -53,7 +53,7 @@ static void pgm_save(unsigned char *buf, int wrap, int xsize, int ysize,
 int main(int argc, char **argv)
 {
     const char *filename, *outfilename;
-    AVCodec *codec;
+    const AVCodec *codec;
     AVCodecContext *c= NULL;
     int frame, got_picture, len;
     FILE *f;