diff --git a/dictsource/ru_rules b/dictsource/ru_rules
index 4b45cd6c..a1ff8a21 100644
--- a/dictsource/ru_rules
+++ b/dictsource/ru_rules
@@ -174,7 +174,7 @@
         з (ффY  s
         з (хY   s
         з (хкY  s
-        зч      S;
+        з (ч    S;
         з (ш    S
         зщ      S;
         з (щ    s