diff --git a/gst-libs/gst/tag/id3v2.c b/gst-libs/gst/tag/id3v2.c
index 12765e61fe..a14eccef9c 100644
--- a/gst-libs/gst/tag/id3v2.c
+++ b/gst-libs/gst/tag/id3v2.c
@@ -101,6 +101,8 @@ id3demux_read_id3v1_tag (GstBuffer * buffer, guint * id3v1_size,
   } else
     *tags = new_tags;
 
+  if (id3v1_size)
+    *id3v1_size = ID3V1_TAG_SIZE;
   return ID3TAGS_READ_TAG;
 }