diff --git a/libavformat/id3v2.c b/libavformat/id3v2.c
index 3bdd23a250..90314583a7 100644
--- a/libavformat/id3v2.c
+++ b/libavformat/id3v2.c
@@ -304,7 +304,7 @@ static int decode_str(AVFormatContext *s, AVIOContext *pb, int encoding,
         }
         break;
     default:
-        av_log(s, AV_LOG_WARNING, "Unknown encoding\n");
+        av_log(s, AV_LOG_WARNING, "Unknown encoding %d\n", encoding);
     }
 
     if (ch)