diff --git a/.hgtags b/.hgtags
index b7495f50cc..5f90cec307 100644
--- a/.hgtags
+++ b/.hgtags
@@ -2900,3 +2900,4 @@ f2c8d86c460d75fec17a0527a2fe93ac7220693e v7-4-174
 6b69d8dde19e32909f4ee3a6337e6a2ecfbb6f72 v7-4-175
 ae228baaec2c5eda4cd948382c2bab498d1a34cc v7-4-176
 df3b0b70d8c1d29817597f45d19bb72755f86bd1 v7-4-177
+647e6bb15aa3f864eaf447fe77e3e3ae7e37b134 v7-4-178