diff --git a/.hgtags b/.hgtags
--- a/.hgtags
+++ b/.hgtags
@@ -13,3 +13,4 @@ 56a4a4578fc454ee455e33dd74a2cc82234bcb59
 34d6f3d5deb22be56b6c1512ec654bd7f6e03bcc 1.7.3
 f5cca33d29c673b67d43f310bebc4e3a21c6d04c 1.7.4
 7f7c33ba6e3f3797ca866c5ed5d358a2393f1371 1.8
+a6b9dd9547bdc17b681502efcceb17aa5c09adf4 1.8.1