diff --git a/mkvparser/mkvparser.cc b/mkvparser/mkvparser.cc
index 80814e0..6e1c26e 100644
--- a/mkvparser/mkvparser.cc
+++ b/mkvparser/mkvparser.cc
@@ -7936,7 +7936,6 @@ long Block::Parse(const Cluster* pCluster) {
     pf = m_frames;
     while (pf != pf_end) {
       Frame& f = *pf++;
-      assert((pos + f.len) <= stop);
       if ((pos + f.len) > stop)
         return E_FILE_FORMAT_INVALID;