diff --git a/.hgtags b/.hgtags
--- a/.hgtags
+++ b/.hgtags
@@ -5,3 +5,4 @@ 1713fb7543386089e364c39703b79e57d3d851f0
 80f183ebbe132ea8433eacae9431360f31fe7083 1.4
 4330ff5a2bf6c543d8aaae8a43de1dc062f3bd13 1.4.1
 8531d7b001392289a6b761f38c73a257606552ad 1.5
+78e843c8b04b5a81cee5aa24601e305fae75da24 1.5.1