diff --git a/effects/CMakeLists.txt b/effects/CMakeLists.txt
index 9567bfd386..83e1f234ca 100644
--- a/effects/CMakeLists.txt
+++ b/effects/CMakeLists.txt
@@ -19,7 +19,6 @@ SET(kwin4_effect_builtins_sources
     fade.cpp
     fallapart.cpp
     flame.cpp
-    magnifier.cpp
     maketransparent.cpp
     minimizeanimation.cpp
     presentwindows.cpp
@@ -40,10 +39,12 @@ SET(kwin4_effect_tests_sources
 
 if(OPENGL_FOUND)
     SET(kwin4_effect_builtins_sources ${kwin4_effect_builtins_sources}
+        magnifier.cpp
         shadow.cpp
         wavywindows.cpp
         )
     install( FILES
+        magnifier.desktop
         shadow.desktop
         wavywindows.desktop
         DESTINATION ${DATA_INSTALL_DIR}/kwin/effects )
diff --git a/effects/demo_taskbarthumbnail.h b/effects/demo_taskbarthumbnail.h
index 335f7a33e1..24d7004f7b 100644
--- a/effects/demo_taskbarthumbnail.h
+++ b/effects/demo_taskbarthumbnail.h
@@ -34,7 +34,7 @@ class TaskbarThumbnailEffect
         virtual void prePaintScreen( int* mask, QRegion* region, int time );
         virtual void prePaintWindow( EffectWindow* w, int* mask, QRegion* paint, QRegion* clip, int time );
         virtual void postPaintScreen();
-        void cursorMoved( const QPoint& pos, Qt::MouseButtons buttons );
+        virtual void cursorMoved( const QPoint& pos, Qt::MouseButtons buttons );
 
     protected:
         QRect getThumbnailPosition( EffectWindow* c, int* space ) const;