diff --git a/.hgtags b/.hgtags
index fea13c1796..53dd672e1a 100644
--- a/.hgtags
+++ b/.hgtags
@@ -5,3 +5,4 @@ a8c16bf00272129b9797a6efc12c9983420b2993 1.6.0
 f491bece1b62fdb4e1452dd95e72a6e3dfb80f8f 1.6.1
 803beb57172ff7d4d0e9075de3bb8a3d4343470d 1.6.2
 4b2d3bddb78d06b4555861db544ea1cc99d8a9ab 1.6.3
+6fca63b22e9cefa7a3ac7d2faab08554a9540923 1.6.4