diff --git a/.hgtags b/.hgtags
index 0922251770..dad2015dcc 100644
--- a/.hgtags
+++ b/.hgtags
@@ -1,3 +1,4 @@
 bfc8e45097fc0e414744408e96708fdf5d2b33a1 5.8.0
 2efa183d80e356d0c11731819456b8dd9bc586db 6.0.0
 68ad2bbc8a5c7be8f7e28abfc29643c50edeae72 6.2.0
+4c49fb91d23f62bcec4079bd4329cc6011a0762d 6.4.0