diff --git a/libavcodec/mpegvideo.h b/libavcodec/mpegvideo.h
index 49252aa9a2..17c2dab05d 100644
--- a/libavcodec/mpegvideo.h
+++ b/libavcodec/mpegvideo.h
@@ -263,7 +263,7 @@ typedef struct MpegEncContext {
     int h263_msmpeg4; ///< generate MSMPEG4 compatible stream (deprecated, use msmpeg4_version instead)
     int h263_flv;     ///< use flv h263 header 
     
-    int codec_id;     /* see CODEC_ID_xxx */
+    enum CodecID codec_id;     /* see CODEC_ID_xxx */
     int fixed_qscale; ///< fixed qscale if non zero 
     int encoding;     ///< true if we are encoding (vs decoding) 
     int flags;        ///< AVCodecContext.flags (HQ, MV4, ...)