diff --git a/.hgtags b/.hgtags
index aa82779fa5..5ff52d1a98 100644
--- a/.hgtags
+++ b/.hgtags
@@ -4,3 +4,4 @@ e55081ceaa04185643d06774bf80303827e4d53b 5.6.0
 875d7e3c1ea4f922723e9e513171f86d4e47ce06 5.8.0
 8fbeddc61c5fbf7fcd6ea98ca8c918030035c435 6.0.0
 fcdea2dcd7dc001e55bf1a1550640f3b16a5e4ad 6.2.0
+a3d38c539e95706189bf10573527d29363a0f790 6.4.0