diff --git a/client.h b/client.h
index 111a0ac165..53fa385ce2 100644
--- a/client.h
+++ b/client.h
@@ -319,7 +319,7 @@ public:
 #endif
     NET::WindowType windowType(bool direct = false, int supported_types = 0) const;
 
-    bool manage(Window w, bool isMapped);
+    bool manage(xcb_window_t w, bool isMapped);
     void releaseWindow(bool on_shutdown = false);
     void destroyClient();
 
diff --git a/manage.cpp b/manage.cpp
index 1c60629481..e736cf82d8 100644
--- a/manage.cpp
+++ b/manage.cpp
@@ -47,7 +47,7 @@ namespace KWin
  * reparenting, initial geometry, initial state, placement, etc.
  * Returns false if KWin is not going to manage this window.
  */
-bool Client::manage(Window w, bool isMapped)
+bool Client::manage(xcb_window_t w, bool isMapped)
 {
     StackingUpdatesBlocker stacking_blocker(workspace());