diff --git a/kcmkwin/kwincompositing/CMakeLists.txt b/kcmkwin/kwincompositing/CMakeLists.txt
index 389458e4c1..bfa5102ffc 100644
--- a/kcmkwin/kwincompositing/CMakeLists.txt
+++ b/kcmkwin/kwincompositing/CMakeLists.txt
@@ -7,6 +7,7 @@ set(kcm_kwincompositing_PART_SRCS
     ktimerdialog.cpp
     ${KDEBASE_WORKSPACE_SOURCE_DIR}/kwin/compositingprefs.cpp
     ${KDEBASE_WORKSPACE_SOURCE_DIR}/kwin/lib/kwinglobals.cpp
+    ${KDEBASE_WORKSPACE_SOURCE_DIR}/kwin/lib/kwinglplatform.cpp
     )
 kde4_add_ui_files(kcm_kwincompositing_PART_SRCS main.ui)
 set(kwin_xml ${KDEBASE_WORKSPACE_SOURCE_DIR}/kwin/org.kde.KWin.xml)
diff --git a/kcmkwin/kwinscreenedges/CMakeLists.txt b/kcmkwin/kwinscreenedges/CMakeLists.txt
index 76ca136b16..4c4e6d850a 100644
--- a/kcmkwin/kwinscreenedges/CMakeLists.txt
+++ b/kcmkwin/kwinscreenedges/CMakeLists.txt
@@ -6,6 +6,7 @@ set(
     monitor.cpp
     ${KDEBASE_WORKSPACE_SOURCE_DIR}/kwin/compositingprefs.cpp
     ${KDEBASE_WORKSPACE_SOURCE_DIR}/kwin/lib/kwinglobals.cpp
+    ${KDEBASE_WORKSPACE_SOURCE_DIR}/kwin/lib/kwinglplatform.cpp
     )
 kde4_add_ui_files( kcm_kwinscreenedges_PART_SRCS main.ui )
 kde4_add_plugin( kcm_kwinscreenedges ${kcm_kwinscreenedges_PART_SRCS} )