diff --git a/.hgtags b/.hgtags
index 31f3eeac95..33ba0d0e20 100644
--- a/.hgtags
+++ b/.hgtags
@@ -9,3 +9,4 @@
 2d7203dea9f48a0bf848f1d46f01c0e60b929205 5.8.0
 414bc035b5a2c0436be216a08e7e09afe20fe1d9 6.0.0
 146d259ebef76ee3ee6f6761a6fd9e1f04cbced4 6.2.0
+c5f2150b8d145b5c933158531e35788889e8bbb6 6.4.0