diff --git a/.hgtags b/.hgtags
index b8d1bd8001..bd58996bdb 100644
--- a/.hgtags
+++ b/.hgtags
@@ -20,3 +20,4 @@ e32589a3bcb51b0afa39c03add8945cd551ef58a 4.8.0
 c4d5e46fcf82f58c549f986399f83668dc01e90c 5.8.0
 74a631f9669fcd6d19c994950b9b090d45c96e1f 6.0.0
 20fad95e052905da73102c0fea52b3e7e3eeb68f 6.2.0
+7acd6d4c1f7b2bb870f62827d78acf14135fc602 6.4.0