diff --git a/.hgtags b/.hgtags
--- a/.hgtags
+++ b/.hgtags
@@ -189,3 +189,4 @@ 1c8c54cf97256f4468da2eb4dbee24f7f3888e71
 197f092b2cd9691e2a55d198f717b231af9be6f9 4.8.2
 593718ff5844cad7a27ee3eb5adad89ac8550949 4.9rc0
 83377b4b4ae0e9a6b8e579f7b0a693b8cf5c3b10 4.9
+4ea21df312ec7159c5b3633096b6ecf68750b0dd 4.9.1