diff --git a/client.cpp b/client.cpp
index 94c79db3b5..e4970b31c5 100644
--- a/client.cpp
+++ b/client.cpp
@@ -3,7 +3,7 @@ kwin - the KDE window manager
 
 Copyright (C) 1999, 2000 Matthias Ettrich <ettrich@kde.org>
 ******************************************************************/
-#define QT_CLEAN_NAMESPACE
+//#define QT_CLEAN_NAMESPACE
 #include <klocale.h>
 #include <kapp.h>
 #include <kdebug.h>
diff --git a/killwindow.cpp b/killwindow.cpp
index 216501589c..4b0d350e64 100644
--- a/killwindow.cpp
+++ b/killwindow.cpp
@@ -4,9 +4,9 @@ kwin - the KDE window manager
 Copyright (C) 1999, 2000 Matthias Ettrich <ettrich@kde.org>
 ******************************************************************/
 
-#ifndef QT_CLEAN_NAMESPACE
-#define QT_CLEAN_NAMESPACE
-#endif
+//#ifndef QT_CLEAN_NAMESPACE
+//#define QT_CLEAN_NAMESPACE
+//#endif
 #include "killwindow.h"
 #include <X11/Xlib.h>
 #include <X11/keysym.h>
diff --git a/main.cpp b/main.cpp
index 8772da1a60..26d5e869ff 100644
--- a/main.cpp
+++ b/main.cpp
@@ -7,7 +7,7 @@ Copyright (C) 1999, 2000 Matthias Ettrich <ettrich@kde.org>
 // X11/Qt conflict
 #undef Bool
 
-#define QT_CLEAN_NAMESPACE
+//#define QT_CLEAN_NAMESPACE
 #include <kconfig.h>
 #include "main.h"
 #include "options.h"
diff --git a/tabbox.cpp b/tabbox.cpp
index a19dfbcb5d..b3a720782e 100644
--- a/tabbox.cpp
+++ b/tabbox.cpp
@@ -3,7 +3,7 @@ kwin - the KDE window manager
 								
 Copyright (C) 1999, 2000 Matthias Ettrich <ettrich@kde.org>
 ******************************************************************/
-#define QT_CLEAN_NAMESPACE
+//#define QT_CLEAN_NAMESPACE
 #include "tabbox.h"
 #include "workspace.h"
 #include "client.h"
diff --git a/workspace.cpp b/workspace.cpp
index 9f534cf747..65461d4721 100644
--- a/workspace.cpp
+++ b/workspace.cpp
@@ -3,7 +3,7 @@ kwin - the KDE window manager
 
 Copyright (C) 1999, 2000 Matthias Ettrich <ettrich@kde.org>
 ******************************************************************/
-#define QT_CLEAN_NAMESPACE
+//#define QT_CLEAN_NAMESPACE
 #include <kconfig.h>
 #include <kglobal.h>
 #include <kglobalsettings.h>