diff --git a/.hgtags b/.hgtags
index ad7dc6bd25..836678a660 100644
--- a/.hgtags
+++ b/.hgtags
@@ -2743,3 +2743,4 @@ c47c8cd5fe5c014c141d9fb3fa8935b268436a4e v7-4-017
 460d5be9395ef3e05f4b1397ea98a5b54d825fc5 v7-4-018
 d5eb32dc231cd870c562e7b0be96fa994b505d9f v7-4-019
 c1ae5baa41f47bbf96be81e0158707a88af48b34 v7-4-020
+c514693882b9f1c7be2e76a0307926df799da3ea v7-4-021