diff --git a/effects/blur/blur.cpp b/effects/blur/blur.cpp
index c8b39b6cbb..5a31af9877 100644
--- a/effects/blur/blur.cpp
+++ b/effects/blur/blur.cpp
@@ -216,10 +216,6 @@ void BlurEffect::drawRegion(const QRegion &region)
 
 void BlurEffect::prePaintScreen(ScreenPrePaintData &data, int time)
 {
-    EffectWindowList windows = effects->stackingOrder();
-    QLinkedList<QRegion> blurRegions;
-    bool checkDecos = effects->decorationsHaveAlpha() && effects->decorationSupportsBlurBehind();
-    bool clipChanged = false;
     m_damagedArea = QRegion();
     m_currentBlur = QRegion();
 
diff --git a/effects/trackmouse/trackmouse.cpp b/effects/trackmouse/trackmouse.cpp
index 8c95a9a567..ab83c1d56f 100644
--- a/effects/trackmouse/trackmouse.cpp
+++ b/effects/trackmouse/trackmouse.cpp
@@ -116,9 +116,7 @@ void TrackMouseEffect::paintScreen(int mask, QRegion region, ScreenPaintData& da
 #ifndef KWIN_HAVE_OPENGLES
         glPushAttrib(GL_CURRENT_BIT | GL_ENABLE_BIT);
 #endif
-        bool useShader = false;
         if (ShaderManager::instance()->isValid()) {
-            useShader = true;
             ShaderManager::instance()->pushShader(ShaderManager::SimpleShader);
         }
         texture->bind();
diff --git a/kcmkwin/kwinoptions/windows.cpp b/kcmkwin/kwinoptions/windows.cpp
index ad20a8acdc..84c3cb5380 100644
--- a/kcmkwin/kwinoptions/windows.cpp
+++ b/kcmkwin/kwinoptions/windows.cpp
@@ -1116,8 +1116,6 @@ void KMovingConfig::load(void)
 
 void KMovingConfig::save(void)
 {
-    int v;
-
     KConfigGroup cg(config, "Windows");
 
     cg.writeEntry(KWIN_MOVE_RESIZE_MAXIMIZED, moveResizeMaximized->isChecked());
diff --git a/libkwineffects/kwineffects.cpp b/libkwineffects/kwineffects.cpp
index 43ab44a599..1ad53bce19 100644
--- a/libkwineffects/kwineffects.cpp
+++ b/libkwineffects/kwineffects.cpp
@@ -850,7 +850,6 @@ void WindowMotionManager::calculate(int time)
     QHash<EffectWindow*, WindowMotion>::iterator it = m_managedWindows.begin();
     for (; it != m_managedWindows.end(); ++it) {
         WindowMotion *motion = &it.value();
-        EffectWindow *window = it.key();
         int stopped = 0;
 
         // TODO: What happens when distance() == 0 but we are still moving fast?