diff --git a/effects/blur/blurshader.h b/effects/blur/blurshader.h
index ad32bcdc3b..a1ff487495 100644
--- a/effects/blur/blurshader.h
+++ b/effects/blur/blurshader.h
@@ -119,7 +119,7 @@ public:
     void bind();
     void unbind();
     void setTextureMatrix(const QMatrix4x4 &) {}
-    void setModelViewProjectionMatrix(const QMatrix4x4 &matrix) {}
+    void setModelViewProjectionMatrix(const QMatrix4x4 &) {}
 
     static bool supported();
 
diff --git a/effects/coverswitch/coverswitch.cpp b/effects/coverswitch/coverswitch.cpp
index 0f30927ff7..ba79799b69 100644
--- a/effects/coverswitch/coverswitch.cpp
+++ b/effects/coverswitch/coverswitch.cpp
@@ -268,7 +268,6 @@ void CoverSwitchEffect::paintScreen(int mask, QRegion region, ScreenPaintData& d
 #ifndef KWIN_HAVE_OPENGLES
             glPolygonMode(GL_FRONT, GL_FILL);
 #endif
-            QRect fullRect = effects->clientArea(FullArea, activeScreen, effects->currentDesktop());
             // we can use a huge scale factor (needed to calculate the rearground vertices)
             // as we restrict with a PaintClipper painting on the current screen
             float reflectionScaleFactor = 100000 * tan(60.0 * M_PI / 360.0f) / area.width();
@@ -336,6 +335,7 @@ void CoverSwitchEffect::paintScreen(int mask, QRegion region, ScreenPaintData& d
             } else {
 #ifndef KWIN_HAVE_OPENGLES
                 glPushMatrix();
+                QRect fullRect = effects->clientArea(FullArea, activeScreen, effects->currentDesktop());
                 if (effects->numScreens() > 1 && area.x() != fullRect.x()) {
                     // have to change the reflection area in horizontal layout and right screen
                     glTranslatef(-area.x(), 0.0, 0.0);
@@ -737,8 +737,6 @@ void CoverSwitchEffect::paintWindowCover(EffectWindow* w, bool reflectedWindow,
         }
     }
 
-    QRect thumbnail = infiniteRegion();
-
     if (reflectedWindow) {
         if (ShaderManager::instance()->isValid()) {
             GLShader *shader = ShaderManager::instance()->pushShader(ShaderManager::GenericShader);
diff --git a/effects/presentwindows/presentwindows.cpp b/effects/presentwindows/presentwindows.cpp
index 81c058dd47..40c34c9845 100755
--- a/effects/presentwindows/presentwindows.cpp
+++ b/effects/presentwindows/presentwindows.cpp
@@ -1487,7 +1487,7 @@ bool PresentWindowsEffect::isOverlappingAny(EffectWindow *w, const QHash<EffectW
 //-----------------------------------------------------------------------------
 // Activation
 
-void PresentWindowsEffect::setActive(bool active, bool closingTab)
+void PresentWindowsEffect::setActive(bool active)
 {
     if (effects->activeFullScreenEffect() && effects->activeFullScreenEffect() != this)
         return;
diff --git a/effects/presentwindows/presentwindows.h b/effects/presentwindows/presentwindows.h
index 0054c22fdd..71052660b5 100644
--- a/effects/presentwindows/presentwindows.h
+++ b/effects/presentwindows/presentwindows.h
@@ -131,7 +131,7 @@ public:
     };
 
 public slots:
-    void setActive(bool active, bool closingTab = false);   // HACK: closingTab shouldn't be needed
+    void setActive(bool active);
     void toggleActive()  {
         m_mode = ModeCurrentDesktop;
         setActive(!m_activated);
diff --git a/effects/taskbarthumbnail/taskbarthumbnail.cpp b/effects/taskbarthumbnail/taskbarthumbnail.cpp
index ae362129c6..30e360272d 100644
--- a/effects/taskbarthumbnail/taskbarthumbnail.cpp
+++ b/effects/taskbarthumbnail/taskbarthumbnail.cpp
@@ -131,9 +131,7 @@ void TaskbarThumbnailEffect::slotPropertyNotify(EffectWindow* w, long a)
 {
     if (!w || a != atom)
         return;
-    foreach (const Data & thumb, thumbnails.values(w)) {
-        w->addRepaintFull();
-    }
+    w->addRepaintFull();
     thumbnails.remove(w);
     QByteArray data = w->readProperty(atom, atom, 32);
     if (data.length() < 1)
diff --git a/effects/wobblywindows/wobblywindows.cpp b/effects/wobblywindows/wobblywindows.cpp
index 077b393769..d940a8aaa6 100644
--- a/effects/wobblywindows/wobblywindows.cpp
+++ b/effects/wobblywindows/wobblywindows.cpp
@@ -372,6 +372,7 @@ void WobblyWindowsEffect::slotWindowStartUserMovedResized(EffectWindow *w)
 
 void WobblyWindowsEffect::slotWindowStepUserMovedResized(EffectWindow *w, const QRect &geometry)
 {
+    Q_UNUSED(geometry)
     if (windows.contains(w)) {
         WindowWobblyInfos& wwi = windows[w];
         QRect rect = w->geometry();
@@ -397,6 +398,8 @@ void WobblyWindowsEffect::slotWindowFinishUserMovedResized(EffectWindow *w)
 
 void WobblyWindowsEffect::slotWindowMaximizeStateChanged(EffectWindow *w, bool horizontal, bool vertical)
 {
+    Q_UNUSED(horizontal)
+    Q_UNUSED(vertical)
     if (w->isUserMove() || !m_moveEffectEnabled || w->isSpecialWindow())
         return;
 
diff --git a/libkwineffects/kwinanimationeffect.cpp b/libkwineffects/kwinanimationeffect.cpp
index 4ef79e43ac..363cab0815 100644
--- a/libkwineffects/kwinanimationeffect.cpp
+++ b/libkwineffects/kwinanimationeffect.cpp
@@ -732,6 +732,7 @@ region_creation:
 
 void AnimationEffect::_expandedGeometryChanged(KWin::EffectWindow *w, const QRect &old)
 {
+    Q_UNUSED(old)
     Q_D(AnimationEffect);
     AniMap::const_iterator entry = d->m_animations.constFind(w);
     if (entry != d->m_animations.constEnd()) {
diff --git a/libkwineffects/kwinglutils.cpp b/libkwineffects/kwinglutils.cpp
index 0b125ef185..f59afbf4e7 100644
--- a/libkwineffects/kwinglutils.cpp
+++ b/libkwineffects/kwinglutils.cpp
@@ -1157,7 +1157,9 @@ GLVertexBuffer *GLVertexBufferPrivate::streamingBuffer = NULL;
 void GLVertexBufferPrivate::legacyPainting(QRegion region, GLenum primitiveMode, bool hardwareClipping)
 {
 #ifdef KWIN_HAVE_OPENGLES
+    Q_UNUSED(region)
     Q_UNUSED(primitiveMode)
+    Q_UNUSED(hardwareClipping)
 #else
     // Enable arrays
     glEnableClientState(GL_VERTEX_ARRAY);
@@ -1230,7 +1232,9 @@ void GLVertexBufferPrivate::corePainting(const QRegion& region, GLenum primitive
 void GLVertexBufferPrivate::fallbackPainting(const QRegion& region, GLenum primitiveMode, bool hardwareClipping)
 {
 #ifdef KWIN_HAVE_OPENGLES
+    Q_UNUSED(region)
     Q_UNUSED(primitiveMode)
+    Q_UNUSED(hardwareClipping)
 #else
     glEnableClientState(GL_VERTEX_ARRAY);
     glEnableClientState(GL_TEXTURE_COORD_ARRAY);