diff --git a/.hgtags b/.hgtags
index 36f9d13196..fc4cff75ea 100644
--- a/.hgtags
+++ b/.hgtags
@@ -2720,3 +2720,4 @@ ba37e955913e85700677b89a720c6e5fc8d23cc3 v7-4b-016
 7ed1ec814dafe8109a2f34302174267d31bbc924 v7-4b-018
 74a211a0d3a3135dd67329cd981f5100f5e4d064 v7-4b-019
 46cf49cc9289920704999a971f397eee1efdb3fc v7-4b-020
+059c8a4b103f6971276435127c7ad970a81b0b2c v7-4b-021