diff --git a/CMakeLists.txt b/CMakeLists.txt
index 95fb9c983f..3b93091b19 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -197,7 +197,6 @@ set_target_properties(kwin PROPERTIES OUTPUT_NAME ${KWIN_NAME})
 set_target_properties(kdeinit_kwin PROPERTIES OUTPUT_NAME kdeinit4_${KWIN_NAME})
 
 if(OPENGL_FOUND)
-  set_target_properties(kdeinit_kwin PROPERTIES COMPILE_FLAGS -DKWIN_HAVE_OPENGL)
   add_subdirectory(opengltest)
   target_link_libraries(kdeinit_kwin kwinglutils ${OPENGL_gl_LIBRARY})
   # -ldl used by OpenGL code
@@ -209,7 +208,7 @@ if(OPENGL_FOUND)
   target_link_libraries(kdeinit_kwin kwinnvidiahack)
 elseif(OPENGLES_FOUND)
   target_link_libraries(kdeinit_kwin ${kwinLibs} kwinglesutils ${OPENGLES_LIBRARIES})
-  set_target_properties(kdeinit_kwin PROPERTIES COMPILE_FLAGS "-DKWIN_HAVE_OPENGL -DKWIN_HAVE_OPENGLES")
+  set_target_properties(kdeinit_kwin PROPERTIES COMPILE_FLAGS "-DKWIN_HAVE_OPENGLES")
 endif(OPENGL_FOUND)
 
 install(TARGETS kdeinit_kwin ${INSTALL_TARGETS_DEFAULT_ARGS} )
@@ -218,7 +217,7 @@ install(TARGETS kwin         ${INSTALL_TARGETS_DEFAULT_ARGS} )
 if(OPENGLES_FOUND)
   kde4_add_kdeinit_executable( kwin_gles ${kwin_KDEINIT_SRCS})
   target_link_libraries(kdeinit_kwin_gles ${kwinLibs} kwinglesutils ${OPENGLES_LIBRARIES})
-  set_target_properties(kdeinit_kwin_gles PROPERTIES COMPILE_FLAGS "-DKWIN_HAVE_OPENGL -DKWIN_HAVE_OPENGLES")
+  set_target_properties(kdeinit_kwin_gles PROPERTIES COMPILE_FLAGS "-DKWIN_HAVE_OPENGLES")
   set_target_properties(kwin_gles PROPERTIES OUTPUT_NAME ${KWIN_NAME}_gles)
   set_target_properties(kdeinit_kwin_gles PROPERTIES OUTPUT_NAME kdeinit4_${KWIN_NAME}_gles)
   install(TARGETS kdeinit_kwin_gles ${INSTALL_TARGETS_DEFAULT_ARGS} )
diff --git a/effects/CMakeLists.txt b/effects/CMakeLists.txt
index f5a2269f10..1a6038fd70 100644
--- a/effects/CMakeLists.txt
+++ b/effects/CMakeLists.txt
@@ -13,10 +13,9 @@ macro( KWIN4_ADD_EFFECT name )
         KWIN4_ADD_EFFECT_BACKEND(kwin4_effect_${name} ${ARGN})
         if(OPENGL_FOUND)
             target_link_libraries(kwin4_effect_${name} kwinglutils)
-            set_target_properties(kwin4_effect_${name} PROPERTIES COMPILE_FLAGS -DKWIN_HAVE_OPENGL)
         elseif(OPENGLES_FOUND)
             target_link_libraries(kwin4_effect_${name} kwinglesutils)
-            set_target_properties(kwin4_effect_${name} PROPERTIES COMPILE_FLAGS "-DKWIN_HAVE_OPENGL -DKWIN_HAVE_OPENGLES")
+            set_target_properties(kwin4_effect_${name} PROPERTIES COMPILE_FLAGS "-DKWIN_HAVE_OPENGLES")
         endif(OPENGL_FOUND)
         set_target_properties(kwin4_effect_${name} PROPERTIES OUTPUT_NAME ${KWIN_NAME}4_effect_${name})
         install( TARGETS kwin4_effect_${name} DESTINATION ${PLUGIN_INSTALL_DIR} )
@@ -27,7 +26,7 @@ macro( KWIN4_ADD_EFFECT name )
         KWIN4_ADD_EFFECT_BACKEND(kwin4_effect_gles_${name} ${ARGN})
         # OpenGL ES gets into a different library
         target_link_libraries(kwin4_effect_gles_${name} kwinglesutils)
-        set_target_properties(kwin4_effect_gles_${name} PROPERTIES COMPILE_FLAGS "-DKWIN_HAVE_OPENGL -DKWIN_HAVE_OPENGLES")
+        set_target_properties(kwin4_effect_gles_${name} PROPERTIES COMPILE_FLAGS "-DKWIN_HAVE_OPENGLES")
         set_target_properties(kwin4_effect_gles_${name} PROPERTIES OUTPUT_NAME ${KWIN_NAME}4_effect_gles_${name})
         install( TARGETS kwin4_effect_gles_${name} DESTINATION ${PLUGIN_INSTALL_DIR} )
     endif(OPENGLES_FOUND)
@@ -48,9 +47,7 @@ macro( KWIN4_ADD_EFFECT_CONFIG name )
     kde4_add_ui_files( kwin4_effect_src ${kwin4_effect_ui} )
     kde4_add_plugin( kcm_kwin4_effect_${name} ${kwin4_effect_src} )
     if(OPENGLES_FOUND)
-        set_target_properties(kcm_kwin4_effect_${name} PROPERTIES COMPILE_FLAGS "-DKWIN_HAVE_OPENGL -DKWIN_HAVE_OPENGLES")
-    elseif(OPENGL_FOUND)
-        set_target_properties(kcm_kwin4_effect_${name} PROPERTIES COMPILE_FLAGS -DKWIN_HAVE_OPENGL)
+        set_target_properties(kcm_kwin4_effect_${name} PROPERTIES COMPILE_FLAGS "-DKWIN_HAVE_OPENGLES")
     endif(OPENGLES_FOUND)
     target_link_libraries( kcm_kwin4_effect_${name} kwineffects ${KDE4_KIO_LIBS} ${KDE4_KDEUI_LIBS} )
     install( TARGETS kcm_kwin4_effect_${name} DESTINATION ${PLUGIN_INSTALL_DIR} )