diff --git a/clients/b2/CMakeLists.txt b/clients/b2/CMakeLists.txt
index 35f40db454..9295cbea82 100644
--- a/clients/b2/CMakeLists.txt
+++ b/clients/b2/CMakeLists.txt
@@ -1,5 +1,3 @@
-add_definitions (-DQT3_SUPPORT -DQT3_SUPPORT_WARNINGS)
-
 add_subdirectory( config ) 
 
 ########### next target ###############
diff --git a/clients/b2/b2client.cpp b/clients/b2/b2client.cpp
index 5324ce705a..6b52996423 100644
--- a/clients/b2/b2client.cpp
+++ b/clients/b2/b2client.cpp
@@ -1447,7 +1447,7 @@ void B2Button::leaveEvent(QEvent *e)
 // =====================================
 
 B2Titlebar::B2Titlebar(B2Client *parent)
-    : QWidget(parent->widget(), Qt::WStyle_Customize | Qt::WNoAutoErase),
+    : QWidget(parent->widget()),
       client(parent),
       set_x11mask(false), isfullyobscured(false), shift_move(false)
 {
diff --git a/clients/modernsystem/CMakeLists.txt b/clients/modernsystem/CMakeLists.txt
index e8841ce09b..58452ba6d3 100644
--- a/clients/modernsystem/CMakeLists.txt
+++ b/clients/modernsystem/CMakeLists.txt
@@ -1,5 +1,3 @@
-add_definitions (-DQT3_SUPPORT -DQT3_SUPPORT_WARNINGS)
-
 add_subdirectory( config ) 
 
 ########### next target ###############
diff --git a/clients/quartz/CMakeLists.txt b/clients/quartz/CMakeLists.txt
index 78f434b5f2..0bf29dbf30 100644
--- a/clients/quartz/CMakeLists.txt
+++ b/clients/quartz/CMakeLists.txt
@@ -1,5 +1,3 @@
-add_definitions (-DQT3_SUPPORT -DQT3_SUPPORT_WARNINGS)
-
 add_subdirectory( config ) 
 
 ########### next target ###############
diff --git a/clients/redmond/CMakeLists.txt b/clients/redmond/CMakeLists.txt
index c642b5666b..c484a8b5b3 100644
--- a/clients/redmond/CMakeLists.txt
+++ b/clients/redmond/CMakeLists.txt
@@ -1,5 +1,3 @@
-add_definitions (-DQT3_SUPPORT -DQT3_SUPPORT_WARNINGS)
-
 set(kwin3_redmond_PART_SRCS redmond.cpp)
 
 kde4_add_plugin(kwin3_redmond ${kwin3_redmond_PART_SRCS})