diff --git a/src/extract/tracks.cpp b/src/extract/tracks.cpp
index ac632440b..8d0db5e1b 100644
--- a/src/extract/tracks.cpp
+++ b/src/extract/tracks.cpp
@@ -328,7 +328,7 @@ extract_tracks(const char *file_name,
 
     while (1) {
       // Next element must be a segment
-      l0 = es->FindNextID(KaxSegment::ClassInfos, 0); //0xFFFFFFFFFFFFFFFFLL);
+      l0 = es->FindNextID(KaxSegment::ClassInfos, 0xFFFFFFFFFFFFFFFFLL);
       if (l0 == NULL) {
         show_error(_("No segment/level 0 element found."));
         return false;