diff --git a/kcmkwin/kwinrules/rulesmodel.cpp b/kcmkwin/kwinrules/rulesmodel.cpp
index 775413e403..8f54e1083c 100644
--- a/kcmkwin/kwinrules/rulesmodel.cpp
+++ b/kcmkwin/kwinrules/rulesmodel.cpp
@@ -410,7 +410,7 @@ void RulesModel::populateRuleList()
     types->setFlag(RuleItem::AffectsWarning);
 
     addRule(new RuleItem(QLatin1String("windowrole"),
-                         RulePolicy::NoPolicy, RuleItem::String,
+                         RulePolicy::StringMatch, RuleItem::String,
                          i18n("Window role"), i18n("Window matching"),
                          QIcon::fromTheme("dialog-object-properties")));