diff --git a/libavcodec/mpegvideo_enc.c b/libavcodec/mpegvideo_enc.c
index ae3b131229..f12e603215 100644
--- a/libavcodec/mpegvideo_enc.c
+++ b/libavcodec/mpegvideo_enc.c
@@ -165,7 +165,7 @@ void ff_convert_matrix(MpegEncContext *s, int (*qmat)[64],
         }
     }
     if (shift) {
-        av_log(NULL, AV_LOG_INFO,
+        av_log(s->avctx, AV_LOG_INFO,
                "Warning, QMAT_SHIFT is larger than %d, overflows possible\n",
                QMAT_SHIFT - shift);
     }