diff --git a/.hgrc b/.hgrc
index bc3d87a..b8b45f0 100644
--- a/.hgrc
+++ b/.hgrc
@@ -87,10 +87,12 @@ addremove = --similarity 100
 [alias]
 nudge = push --rev .
 tmd = diff --no-color -U 10
-cm = commit -m
 st = status -C
 ? = summary
 
+cm = commit -m
+cus = commit -m 'Update subrepository state.'
+
 #mlocal = merge --config 'ui.merge=internal:local'
 #mother = merge --config 'ui.merge=internal:other'
 #mfail = merge --config 'ui.merge=internal:fail'