diff --git a/.hgtags b/.hgtags
index e3f86899a1..41631a5f74 100644
--- a/.hgtags
+++ b/.hgtags
@@ -23,3 +23,4 @@ e26685c39167396eaf778fe11cc1a7998f258895 magarena_1_17
 60add5e75eb10bec529cac06e505fde4bdfd0631 magarena_1_19
 3fb1f3f7468c85d766612f5e54caf06850f4d251 magarena_1_20
 943eef0f593cc21b2a62a668252b51da952ea7ba magarena_1_20b
+4f35d0e38f30332f7ceefa261e79b5d19453137a magarena_1_21