diff --git a/client/CMakeLists.txt b/client/CMakeLists.txt
index 64b6bd3..1377087 100644
--- a/client/CMakeLists.txt
+++ b/client/CMakeLists.txt
@@ -21,7 +21,7 @@ link_directories(
 tde_add_kpart( twin3_deKorator AUTOMOC
 
   SOURCES
-        deKoratorclient.cc
+        deKoratorclient.cpp
 	shadow.cpp
   LINK
      tdecore-shared
diff --git a/client/config/CMakeLists.txt b/client/config/CMakeLists.txt
index e88c378..c303eb4 100644
--- a/client/config/CMakeLists.txt
+++ b/client/config/CMakeLists.txt
@@ -17,7 +17,7 @@ link_directories(
 tde_add_kpart( twin_deKorator_config AUTOMOC
 
   SOURCES
-        deKoratorconfig.cc
+        deKoratorconfig.cpp
         configdialog.ui
 	themes.cpp
   LINK
diff --git a/client/config/deKoratorconfig.cc b/client/config/deKoratorconfig.cpp
similarity index 100%
rename from client/config/deKoratorconfig.cc
rename to client/config/deKoratorconfig.cpp
diff --git a/client/config/themes.moc.cc b/client/config/themes.moc.cpp
similarity index 100%
rename from client/config/themes.moc.cc
rename to client/config/themes.moc.cpp
diff --git a/client/deKoratorclient.cc b/client/deKoratorclient.cpp
similarity index 100%
rename from client/deKoratorclient.cc
rename to client/deKoratorclient.cpp
diff --git a/client/themes.moc.cc b/client/themes.moc.cpp
similarity index 100%
rename from client/themes.moc.cc
rename to client/themes.moc.cpp