diff --git a/dictsource/ru_rules b/dictsource/ru_rules
index 8919873a..96fc4a1f 100644
--- a/dictsource/ru_rules
+++ b/dictsource/ru_rules
@@ -399,7 +399,7 @@
 
 
 .group щ
-        щ       S;
+        щ       StS;
         щ (бY   Z;
         щ (б    Z;
         щ (бвY  Z;