diff --git a/.hgtags b/.hgtags
index 8d91bc6610..bec625d76c 100644
--- a/.hgtags
+++ b/.hgtags
@@ -8,3 +8,4 @@ c61628856c63e5efc941573029a21dfb14f1ce06 4.8.0
 199c9c6bf4abe1ab1984ddd7d11e3ef6cd973d0b 5.8.0
 6770e1add356bc79935ab2b7a7cf9021d94e4cd8 6.0.0
 e5190aae89d423191f15f500f42a0f35cb21f117 6.2.0
+9af60e26dd79dd30e6ec0609e365344b1250d29c 6.4.0