diff --git a/kcmkwin/kwinrules/kcm.h b/kcmkwin/kwinrules/kcm.h
--- a/kcmkwin/kwinrules/kcm.h
+++ b/kcmkwin/kwinrules/kcm.h
@@ -38,7 +38,6 @@
     KCMRules(QWidget *parent, const QVariantList &args);
     void load() override;
     void save() override;
-    void defaults() override;
     QString quickHelp() const override;
 protected Q_SLOTS:
     void moduleChanged(bool state);
diff --git a/kcmkwin/kwinrules/kcm.cpp b/kcmkwin/kwinrules/kcm.cpp
--- a/kcmkwin/kwinrules/kcm.cpp
+++ b/kcmkwin/kwinrules/kcm.cpp
@@ -51,6 +51,7 @@
                                        QString(), QString(), KAboutLicense::GPL, i18n("(c) 2004 KWin and KControl Authors"));
     about->addAuthor(i18n("Lubos Lunak"), QString(), "l.lunak@kde.org");
     setAboutData(about);
+    setButtons(KCModule::Help | KCModule::Apply);
 }
 
 void KCMRules::load()
@@ -70,11 +71,6 @@
 
 }
 
-void KCMRules::defaults()
-{
-    widget->defaults();
-}
-
 QString KCMRules::quickHelp() const
 {
     return i18n("<p><h1>Window-specific Settings</h1> Here you can customize window settings specifically only"
diff --git a/kcmkwin/kwinrules/ruleslist.h b/kcmkwin/kwinrules/ruleslist.h
--- a/kcmkwin/kwinrules/ruleslist.h
+++ b/kcmkwin/kwinrules/ruleslist.h
@@ -36,7 +36,6 @@
     ~KCMRulesList() override;
     void load();
     void save();
-    void defaults();
 Q_SIGNALS:
     void changed(bool);
 private Q_SLOTS:
diff --git a/kcmkwin/kwinrules/ruleslist.cpp b/kcmkwin/kwinrules/ruleslist.cpp
--- a/kcmkwin/kwinrules/ruleslist.cpp
+++ b/kcmkwin/kwinrules/ruleslist.cpp
@@ -229,10 +229,5 @@
     m_settings.save();
 }
 
-void KCMRulesList::defaults()
-{
-    load();
-}
-
 } // namespace