diff --git a/.hgtags b/.hgtags
index 7f3a5ad6c..3b97352f3 100644
--- a/.hgtags
+++ b/.hgtags
@@ -15,3 +15,4 @@ df60c7686f3982791e218977edb64d638151ca3b v18.0
 7f21bd92812d2d08fe9a881a401cbf0f6b104081 v18.3
 78be73b57b829adb20a452ad910f7039a09c9474 v18.4
 3026cfaf82c5a878b2c81ee4d6445237d453e372 v18.5
+6a929c3ad782f17e34d364665e6e277e3ff99912 v18.6