diff --git a/.hgtags b/.hgtags
index 7702732bb1..0ba66e1037 100644
--- a/.hgtags
+++ b/.hgtags
@@ -5,3 +5,4 @@ a0e3cefc2fb50003370fbf07a53a2cf75ed16a2c 5.6.0
 6ed9bc5c95baa5d3317228ea8d50cd4a00992949 5.8.0
 98987a9131330ded23570dd3209d02ac07d79c70 6.0.0
 f1e9967531954978ceb15317bf4edc630f5807a7 6.2.0
+b72c63d53c7667c639fcc2be0673471ceaa5b7ab 6.4.0