diff --git a/.hgtags b/.hgtags
index 9199f9111e..c702a2de6f 100644
--- a/.hgtags
+++ b/.hgtags
@@ -7,3 +7,4 @@ fc810f58d3b4705a43454655f29153ef4845b420 5.2.0
 fa1b7c84a9b40605b67653700f268349a6d6aca1 5.8.0
 a5cd61aff155e68d69de636848e757dd88449280 6.0.0
 4ad4c747c4789eb7f5898e8e8317f5b59bb4cc20 6.2.0
+33ab209a40d4ffbabc335a502b168f777c41fceb 6.4.0