diff --git a/.hgtags b/.hgtags
index 9fc2ad6bf4..28e0dc4932 100644
--- a/.hgtags
+++ b/.hgtags
@@ -25,3 +25,4 @@ fc05c15856a5018d7ad0bdb0f34e80dfd56e7b3a 5.6.0
 8bef621cc3cda3d6bdaf1cd4b85fa43e9dacfd51 5.8.0
 1f5bf85b97b4457c460270884d1c0cd839008e59 6.0.0
 22fa5ffe0af4ef4a073253c71483e97dc2fb26de 6.2.0
+baafc12549df591558de8bf2718866a8fcfaf203 6.4.0