diff --git a/effects/coverswitch_config.h b/effects/coverswitch_config.h
index ac078114a2..a1d5895072 100644
--- a/effects/coverswitch_config.h
+++ b/effects/coverswitch_config.h
@@ -21,9 +21,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #ifndef KWIN_COVERSWITCH_CONFIG_H
 #define KWIN_COVERSWITCH_CONFIG_H
 
-#define KDE3_SUPPORT
 #include <kcmodule.h>
-#undef KDE3_SUPPORT
 
 #include "ui_coverswitch_config.h"
 
diff --git a/effects/desktopgrid_config.h b/effects/desktopgrid_config.h
index 01a3ca2102..5267f822cf 100644
--- a/effects/desktopgrid_config.h
+++ b/effects/desktopgrid_config.h
@@ -21,9 +21,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #ifndef KWIN_DESKTOPGRID_CONFIG_H
 #define KWIN_DESKTOPGRID_CONFIG_H
 
-#define KDE3_SUPPORT
 #include <kcmodule.h>
-#undef KDE3_SUPPORT
 
 class QComboBox;
 class QCheckBox;
diff --git a/effects/diminactive_config.h b/effects/diminactive_config.h
index 927f9db221..a9059e680a 100644
--- a/effects/diminactive_config.h
+++ b/effects/diminactive_config.h
@@ -21,9 +21,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #ifndef KWIN_DIMINACTIVE_CONFIG_H
 #define KWIN_DIMINACTIVE_CONFIG_H
 
-#define KDE3_SUPPORT
 #include <kcmodule.h>
-#undef KDE3_SUPPORT
 
 #include "ui_diminactive_config.h"
 
diff --git a/effects/flipswitch_config.h b/effects/flipswitch_config.h
index 633a3abd13..3cdb3d102e 100644
--- a/effects/flipswitch_config.h
+++ b/effects/flipswitch_config.h
@@ -21,9 +21,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #ifndef KWIN_FLIPSWITCH_CONFIG_H
 #define KWIN_FLIPSWITCH_CONFIG_H
 
-#define KDE3_SUPPORT
 #include <kcmodule.h>
-#undef KDE3_SUPPORT
 
 #include "ui_flipswitch_config.h"
 
diff --git a/effects/invert_config.h b/effects/invert_config.h
index 2275030666..01797b183d 100644
--- a/effects/invert_config.h
+++ b/effects/invert_config.h
@@ -21,9 +21,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #ifndef KWIN_INVERT_CONFIG_H
 #define KWIN_INVERT_CONFIG_H
 
-#define KDE3_SUPPORT
 #include <kcmodule.h>
-#undef KDE3_SUPPORT
 
 class KShortcutsEditor;
 
diff --git a/effects/lookingglass_config.h b/effects/lookingglass_config.h
index 9a5b79beef..dacc7a450d 100644
--- a/effects/lookingglass_config.h
+++ b/effects/lookingglass_config.h
@@ -21,9 +21,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #ifndef KWIN_LOOKINGGLASS_CONFIG_H
 #define KWIN_LOOKINGGLASS_CONFIG_H
 
-#define KDE3_SUPPORT
 #include <kcmodule.h>
-#undef KDE3_SUPPORT
 
 #include "ui_lookingglass_config.h"
 
diff --git a/effects/magnifier_config.h b/effects/magnifier_config.h
index 5ebaea3c03..2ab11ee83c 100644
--- a/effects/magnifier_config.h
+++ b/effects/magnifier_config.h
@@ -21,9 +21,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #ifndef KWIN_MAGNIFIER_CONFIG_H
 #define KWIN_MAGNIFIER_CONFIG_H
 
-#define KDE3_SUPPORT
 #include <kcmodule.h>
-#undef KDE3_SUPPORT
 
 #include "ui_magnifier_config.h"
 
diff --git a/effects/maketransparent_config.h b/effects/maketransparent_config.h
index ed8dca1f83..c8a6d6a1dd 100644
--- a/effects/maketransparent_config.h
+++ b/effects/maketransparent_config.h
@@ -21,9 +21,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #ifndef KWIN_MAKETRANSPARENT_CONFIG_H
 #define KWIN_MAKETRANSPARENT_CONFIG_H
 
-#define KDE3_SUPPORT
 #include <kcmodule.h>
-#undef KDE3_SUPPORT
 
 #include "ui_maketransparent_config.h"
 
diff --git a/effects/mousemark_config.h b/effects/mousemark_config.h
index 575f19b939..ea610a47d3 100644
--- a/effects/mousemark_config.h
+++ b/effects/mousemark_config.h
@@ -21,9 +21,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #ifndef KWIN_MOUSEMARK_CONFIG_H
 #define KWIN_MOUSEMARK_CONFIG_H
 
-#define KDE3_SUPPORT
 #include <kcmodule.h>
-#undef KDE3_SUPPORT
 
 #include "ui_mousemark_config.h"
 
diff --git a/effects/presentwindows_config.h b/effects/presentwindows_config.h
index 4a5e7ed1dc..376ab4dc72 100644
--- a/effects/presentwindows_config.h
+++ b/effects/presentwindows_config.h
@@ -21,9 +21,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #ifndef KWIN_PRESENTWINDOWS_CONFIG_H
 #define KWIN_PRESENTWINDOWS_CONFIG_H
 
-#define KDE3_SUPPORT
 #include <kcmodule.h>
-#undef KDE3_SUPPORT
 
 class QCheckBox;
 class QComboBox;
diff --git a/effects/shadow_config.h b/effects/shadow_config.h
index d311a8310f..49e91e8ea4 100644
--- a/effects/shadow_config.h
+++ b/effects/shadow_config.h
@@ -21,9 +21,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #ifndef KWIN_SHADOW_CONFIG_H
 #define KWIN_SHADOW_CONFIG_H
 
-#define KDE3_SUPPORT
 #include <kcmodule.h>
-#undef KDE3_SUPPORT
 
 class QSpinBox;
 class QCheckBox;
diff --git a/effects/sharpen_config.h b/effects/sharpen_config.h
index c476d2544c..8cf3498769 100644
--- a/effects/sharpen_config.h
+++ b/effects/sharpen_config.h
@@ -21,9 +21,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #ifndef KWIN_SHARPEN_CONFIG_H
 #define KWIN_SHARPEN_CONFIG_H
 
-#define KDE3_SUPPORT
 #include <kcmodule.h>
-#undef KDE3_SUPPORT
 
 class KShortcutsEditor;
 
diff --git a/effects/showfps_config.h b/effects/showfps_config.h
index 90dab68371..6cf4711f31 100644
--- a/effects/showfps_config.h
+++ b/effects/showfps_config.h
@@ -21,9 +21,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #ifndef KWIN_SHOWFPS_CONFIG_H
 #define KWIN_SHOWFPS_CONFIG_H
 
-#define KDE3_SUPPORT
 #include <kcmodule.h>
-#undef KDE3_SUPPORT
 
 #include "ui_showfps_config.h"
 #include "showfps.h"
diff --git a/effects/snow_config.h b/effects/snow_config.h
index a8aafcc8fd..3b2abb7481 100644
--- a/effects/snow_config.h
+++ b/effects/snow_config.h
@@ -21,9 +21,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #ifndef KWIN_SNOW_CONFIG_H
 #define KWIN_SNOW_CONFIG_H
 
-#define KDE3_SUPPORT
 #include <kcmodule.h>
-#undef KDE3_SUPPORT
 
 #include "ui_snow_config.h"
 
diff --git a/effects/thumbnailaside_config.h b/effects/thumbnailaside_config.h
index bf52cadbfd..e5f129fd0b 100644
--- a/effects/thumbnailaside_config.h
+++ b/effects/thumbnailaside_config.h
@@ -21,9 +21,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #ifndef KWIN_THUMBNAILASIDE_CONFIG_H
 #define KWIN_THUMBNAILASIDE_CONFIG_H
 
-#define KDE3_SUPPORT
 #include <kcmodule.h>
-#undef KDE3_SUPPORT
 
 #include "ui_thumbnailaside_config.h"
 
diff --git a/effects/trackmouse_config.h b/effects/trackmouse_config.h
index e3637964a4..de2bd54ea1 100644
--- a/effects/trackmouse_config.h
+++ b/effects/trackmouse_config.h
@@ -21,9 +21,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #ifndef KWIN_TRACKMOUSE_CONFIG_H
 #define KWIN_TRACKMOUSE_CONFIG_H
 
-#define KDE3_SUPPORT
 #include <kcmodule.h>
-#undef KDE3_SUPPORT
 
 
 namespace KWin
diff --git a/effects/videorecord_config.h b/effects/videorecord_config.h
index e6ce824da2..dd0468cbe5 100644
--- a/effects/videorecord_config.h
+++ b/effects/videorecord_config.h
@@ -21,9 +21,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #ifndef KWIN_VIDEORECORD_CONFIG_H
 #define KWIN_VIDEORECORD_CONFIG_H
 
-#define KDE3_SUPPORT
 #include <kcmodule.h>
-#undef KDE3_SUPPORT
 
 class KShortcutsEditor;
 class KUrlRequester;
diff --git a/effects/wobblywindows_config.h b/effects/wobblywindows_config.h
index 3a455d2897..9b749560eb 100644
--- a/effects/wobblywindows_config.h
+++ b/effects/wobblywindows_config.h
@@ -21,9 +21,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #ifndef KWIN_WOBBLY_CONFIG_H
 #define KWIN_WOBBLY_CONFIG_H
 
-#define KDE3_SUPPORT
 #include <kcmodule.h>
-#undef KDE3_SUPPORT
 
 #include "ui_wobblywindows_config.h"
 
diff --git a/effects/zoom_config.h b/effects/zoom_config.h
index 5cfb43c1c6..8045d5a018 100644
--- a/effects/zoom_config.h
+++ b/effects/zoom_config.h
@@ -21,9 +21,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #ifndef KWIN_ZOOM_CONFIG_H
 #define KWIN_ZOOM_CONFIG_H
 
-#define KDE3_SUPPORT
 #include <kcmodule.h>
-#undef KDE3_SUPPORT
 
 class KShortcutsEditor;