diff --git a/.hgtags b/.hgtags
index 79ae4da328..d92f559131 100644
--- a/.hgtags
+++ b/.hgtags
@@ -11,3 +11,4 @@ a28ae04c9aa313e7e402565d9b36428d6ae3c65b 5.4.0
 f8d8f48029aec8592071abce6202d851dd7db2fc 5.8.0
 454fe19f04fc67d3671e4d51ce9964c9017fd3fa 6.0.0
 21db0842fcf4399a69f5b92dd5958518fb1c69e8 6.2.0
+1d593f1932e6289ad63b18ebcd7f5cec281b144f 6.4.0