diff --git a/.hgtags b/.hgtags
index d9cc088a3..088ca1b71 100644
--- a/.hgtags
+++ b/.hgtags
@@ -26,3 +26,4 @@ e1ec47d08d85c6da922fc6fe74bb663264fd20fc 1.2
 0b91d3e737b82a6ddfe872446e25848ae531fc40 1.4
 cfc1cec81fee0b1e1016bf27b5775467eb250839 1.4
 8ed0034d0b454586ed6943a5099f6a91934c4330 1.4.1
+4ec7a156eaff54961491422d1001a8e21bf119e6 1.6-rc