diff --git a/clients/tabstrip/config/tabstripconfig.cpp b/clients/tabstrip/config/tabstripconfig.cpp
index cd14663edf..9261ca4566 100644
--- a/clients/tabstrip/config/tabstripconfig.cpp
+++ b/clients/tabstrip/config/tabstripconfig.cpp
@@ -40,6 +40,7 @@ extern "C"
 
 TabstripConfig::TabstripConfig( KConfig *c, QWidget *parent )
     {
+    Q_UNUSED(c);
     KGlobal::locale()->insertCatalog( "kwin_tabstrip_config" );
     config = new KConfig( "tabstriprc" );
     KConfigGroup cg( config, "General" );
diff --git a/lib/kwineffects.cpp b/lib/kwineffects.cpp
index bfab602831..d444ea372f 100644
--- a/lib/kwineffects.cpp
+++ b/lib/kwineffects.cpp
@@ -155,15 +155,15 @@ void Effect::windowUnminimized( EffectWindow* )
     {
     }
 
-void Effect::clientGroupItemSwitched( EffectWindow* from, EffectWindow* to )
+void Effect::clientGroupItemSwitched( EffectWindow*, EffectWindow* )
     {
     }
 
-void Effect::clientGroupItemAdded( EffectWindow* from, EffectWindow* to )
+void Effect::clientGroupItemAdded( EffectWindow*, EffectWindow* )
     {
     }
 
-void Effect::clientGroupItemRemoved( EffectWindow* c, EffectWindow* group )
+void Effect::clientGroupItemRemoved( EffectWindow*, EffectWindow* )
     {
     }