diff --git a/.hgtags b/.hgtags
index abdb5f610a..34dbe001c4 100644
--- a/.hgtags
+++ b/.hgtags
@@ -3,3 +3,4 @@
 d7e3a25d15aa72096b29d985483e3caeb1fc4a43 5.8.0
 e55605b40ed71ec25e3079bb9c8b473bf879af58 6.0.0
 f3fd1dcb37f9d934da6f6bb0c31770409a93265f 6.2.0
+b7fb7dc89a758cc91d55f523db7513c6365b7af2 6.4.0