diff --git a/libavformat/rmdec.c b/libavformat/rmdec.c
index 60778125bf..1b88766654 100644
--- a/libavformat/rmdec.c
+++ b/libavformat/rmdec.c
@@ -366,7 +366,7 @@ static int get_num(ByteIOContext *pb, int *len)
 
     n = get_be16(pb);
     (*len)-=2;
-    n &= 0x7FFF;
+//    n &= 0x7FFF;
     if (n >= 0x4000) {
         return n - 0x4000;
     } else {