diff --git a/include/modules/cloak.h b/include/modules/cloak.h
index 7a2d7d525..fb841c466 100644
--- a/include/modules/cloak.h
+++ b/include/modules/cloak.h
@@ -131,7 +131,7 @@ protected:
 
 	bool MatchesUser(LocalUser* user) const
 	{
-		if (!classes.empty() && !stdalgo::isin(classes, user->GetClass()->GetName()))
+		if (!classes.empty() && classes.find(user->GetClass()->GetName()) == classes.end())
 			return false;
 
 		// All fields matched.