diff --git a/kwin/composite.cpp b/kwin/composite.cpp
index 3f18cd29..eec1d079 100644
--- a/kwin/composite.cpp
+++ b/kwin/composite.cpp
@@ -551,19 +551,19 @@ void Compositor::performCompositing()
 
 bool Compositor::windowRepaintsPending() const
 {
-    foreach (Toplevel * c, Workspace::self()->clientList()) {
+    foreach (const Toplevel * c, Workspace::self()->clientList()) {
         if (!c->repaints().isEmpty())
             return true;
     }
-    foreach (Toplevel * c, Workspace::self()->desktopList()) {
+    foreach (const Toplevel * c, Workspace::self()->desktopList()) {
         if (!c->repaints().isEmpty())
             return true;
     }
-    foreach (Toplevel * c, Workspace::self()->unmanagedList()) {
+    foreach (const Toplevel * c, Workspace::self()->unmanagedList()) {
         if (!c->repaints().isEmpty())
             return true;
     }
-    foreach (Toplevel * c, Workspace::self()->deletedList()) {
+    foreach (const Toplevel * c, Workspace::self()->deletedList()) {
         if (!c->repaints().isEmpty())
             return true;
     }
diff --git a/kwin/deleted.cpp b/kwin/deleted.cpp
index 8e40625c..b7a95cc1 100644
--- a/kwin/deleted.cpp
+++ b/kwin/deleted.cpp
@@ -102,7 +102,7 @@ void Deleted::copyToDeleted(Toplevel* c)
         m_minimized = client->isMinimized();
         m_modal = client->isModal();
         m_mainClients = client->mainClients();
-        foreach (Client *c, m_mainClients) {
+        foreach (const Client *c, m_mainClients) {
             connect(c, SIGNAL(windowClosed(KWin::Toplevel*,KWin::Deleted*)), SLOT(mainClientClosed(KWin::Toplevel*)));
         }
     }
diff --git a/kwin/effects.cpp b/kwin/effects.cpp
index 9e643c1c..4935b6ed 100644
--- a/kwin/effects.cpp
+++ b/kwin/effects.cpp
@@ -1276,7 +1276,7 @@ QStringList EffectsHandlerImpl::loadedEffects() const
 
 QStringList EffectsHandlerImpl::listOfEffects() const
 {
-    KService::List offers = KServiceTypeTrader::self()->query("KWin/Effect");
+    const KService::List offers = KServiceTypeTrader::self()->query("KWin/Effect");
     QStringList listOfModules;
     // First unload necessary effects
     foreach (const KService::Ptr & service, offers) {
@@ -1435,8 +1435,7 @@ bool EffectsHandlerImpl::loadEffect(const QString& name, bool checkDefault)
         // Make sure all depenedencies have been loaded
         // TODO: detect circular deps
         KPluginInfo plugininfo(service);
-        QStringList dependencies = plugininfo.dependencies();
-        foreach (const QString & depName, dependencies) {
+        foreach (const QString & depName, plugininfo.dependencies()) {
             if (!loadEffect(depName)) {
                 kError(1212) << "EffectsHandler::loadEffect : Couldn't load dependencies for effect " << name << endl;
                 library->unload();