diff --git a/.hgtags b/.hgtags
index 2627ebc0df..dc6eeab4b1 100644
--- a/.hgtags
+++ b/.hgtags
@@ -22,3 +22,4 @@ c50491c745dac44e25636f89a6b75801dbfab983 4.6.0
 ad94830752c16ecf640bac58da21dc04835eb2e3 5.8.0
 14cfe06539b67e240e4a23e8f78031c8b02f9a1e 6.0.0
 4e1e7f522bc06df86e0f9a99f1a15ccaed389d86 6.2.0
+389a571ce0087f8fea6ae0b8ea8ae1e2e5d45e44 6.4.0