diff --git a/kcontrol/displayconfig/CMakeLists.txt b/kcontrol/displayconfig/CMakeLists.txt
index dfa45882b..a4d26960d 100644
--- a/kcontrol/displayconfig/CMakeLists.txt
+++ b/kcontrol/displayconfig/CMakeLists.txt
@@ -31,7 +31,7 @@ install( FILES displayconfig.desktop DESTINATION ${XDG_APPS_INSTALL_DIR} )
 
 ##### kcm_displayconfig (module) ####################
 
-set_source_files_properties( displayconfig.cpp PROPERTIES COMPILE_FLAGS -DKDE_CONFDIR=\\"${TDE_CONFIG_DIR}\\" )
+set_property( SOURCE displayconfig.cpp APPEND PROPERTY COMPILE_DEFINITIONS KDE_CONFDIR="${TDE_CONFIG_DIR}" )
 
 tde_add_kpart( kcm_displayconfig AUTOMOC
   SOURCES
diff --git a/kcontrol/dnssd/CMakeLists.txt b/kcontrol/dnssd/CMakeLists.txt
index e0036ba24..527e9f163 100644
--- a/kcontrol/dnssd/CMakeLists.txt
+++ b/kcontrol/dnssd/CMakeLists.txt
@@ -27,7 +27,7 @@ install( FILES kcm_tdednssd.desktop DESTINATION ${XDG_APPS_INSTALL_DIR} )
 
 ##### kcm_tdednssd (module) #######################
 
-set_source_files_properties( kcmdnssd.cpp PROPERTIES COMPILE_FLAGS -DKDE_CONFDIR=\\"${TDE_CONFIG_DIR}\\" )
+set_property( SOURCE kcmdnssd.cpp APPEND PROPERTY COMPILE_DEFINITIONS KDE_CONFDIR="${TDE_CONFIG_DIR}" )
 
 tde_add_kpart( kcm_tdednssd AUTOMOC
   SOURCES configdialog.ui kcmdnssd.cpp
diff --git a/kcontrol/hwmanager/CMakeLists.txt b/kcontrol/hwmanager/CMakeLists.txt
index 584eba7bc..cf6fc74b9 100644
--- a/kcontrol/hwmanager/CMakeLists.txt
+++ b/kcontrol/hwmanager/CMakeLists.txt
@@ -29,7 +29,7 @@ install( FILES hwmanager.desktop DESTINATION ${XDG_APPS_INSTALL_DIR} )
 
 ##### kcm_iccconfig (module) ####################
 
-set_source_files_properties( hwmanager.cpp PROPERTIES COMPILE_FLAGS -DKDE_CONFDIR=\\"${TDE_CONFIG_DIR}\\" )
+set_property( SOURCE hwmanager.cpp APPEND PROPERTY COMPILE_DEFINITIONS KDE_CONFDIR="${TDE_CONFIG_DIR}" )
 
 tde_add_kpart( kcm_hwmanager AUTOMOC
   SOURCES
diff --git a/kcontrol/iccconfig/CMakeLists.txt b/kcontrol/iccconfig/CMakeLists.txt
index 4af3af694..e3b47ce0d 100644
--- a/kcontrol/iccconfig/CMakeLists.txt
+++ b/kcontrol/iccconfig/CMakeLists.txt
@@ -28,7 +28,7 @@ install( FILES iccconfig.desktop DESTINATION ${XDG_APPS_INSTALL_DIR} )
 
 ##### kcm_iccconfig (module) ####################
 
-set_source_files_properties( iccconfig.cpp PROPERTIES COMPILE_FLAGS -DKDE_CONFDIR=\\"${TDE_CONFIG_DIR}\\" )
+set_property( SOURCE iccconfig.cpp APPEND PROPERTY COMPILE_DEFINITIONS KDE_CONFDIR="${TDE_CONFIG_DIR}" )
 
 tde_add_kpart( kcm_iccconfig AUTOMOC
   SOURCES
diff --git a/kcontrol/tdm/CMakeLists.txt b/kcontrol/tdm/CMakeLists.txt
index 7c2a1f887..4283d0612 100644
--- a/kcontrol/tdm/CMakeLists.txt
+++ b/kcontrol/tdm/CMakeLists.txt
@@ -29,8 +29,7 @@ install( FILES tdm.desktop DESTINATION ${XDG_APPS_INSTALL_DIR} )
 
 ##### kcm_tdm (module) ##########################
 
-set_source_files_properties( background.cpp PROPERTIES COMPILE_FLAGS -DKDE_CONFDIR=\\"${TDE_CONFIG_DIR}\\" )
-set_source_files_properties( main.cpp PROPERTIES COMPILE_FLAGS -DKDE_CONFDIR=\\"${TDE_CONFIG_DIR}\\" )
+set_property( SOURCE background.cpp main.cpp APPEND PROPERTY COMPILE_DEFINITIONS KDE_CONFDIR="${TDE_CONFIG_DIR}" )
 
 tde_add_kpart( kcm_tdm AUTOMOC
   SOURCES
diff --git a/kcontrol/usbview/CMakeLists.txt b/kcontrol/usbview/CMakeLists.txt
index 1584d0699..61138a72c 100644
--- a/kcontrol/usbview/CMakeLists.txt
+++ b/kcontrol/usbview/CMakeLists.txt
@@ -26,7 +26,7 @@ link_directories(
 install( FILES kcmusb.desktop DESTINATION ${XDG_APPS_INSTALL_DIR} )
 
 if( WITH_USBIDS )
-  set_source_files_properties( usbdb.cpp PROPERTIES COMPILE_FLAGS -DUSBIDS_FILE=\\"${WITH_USBIDS}\\" )
+  set_property( SOURCE usbdb.cpp APPEND PROPERTY COMPILE_DEFINITIONS USBIDS_FILE="${WITH_USBIDS}" )
 else( )
   install( FILES usb.ids DESTINATION ${DATA_INSTALL_DIR} )
 endif( )
diff --git a/kdesktop/CMakeLists.txt b/kdesktop/CMakeLists.txt
index fcb84a66a..c8fdabf36 100644
--- a/kdesktop/CMakeLists.txt
+++ b/kdesktop/CMakeLists.txt
@@ -81,8 +81,7 @@ tde_add_executable( kxdglauncher
 ##### kdesktop (tdeinit) ########################
 
 set( target kdesktop )
-set_source_files_properties( lockeng.cc PROPERTIES COMPILE_FLAGS -DKDE_CONFDIR=\\"${TDE_CONFIG_DIR}\\" )
-
+set_property( SOURCE lockeng.cc APPEND PROPERTY COMPILE_DEFINITIONS KDE_CONFDIR="${TDE_CONFIG_DIR}" )
 
 set( ${target}_SRCS
   main.cc krootwm.cc xautolock.cc kdiconview.cc init.cc