diff --git a/.hgtags b/.hgtags
--- a/.hgtags
+++ b/.hgtags
@@ -52,3 +52,4 @@ b032bec2c0a651ca0ddecb65714bfe6770f67d70
 3cb1e95676ad089596bd81d0937cad37d6e3b7fb 1.8.3
 733af5d9f6b22387913e1d11350fb8cb7c1487dd 1.8.4
 de9eb6b1da4fc522b1cab16d86ca166204c24f25 1.9
+4a43e23b8c55b4566b8200bf69fe2158485a2634 1.9.1