diff --git a/clients/default/kdedefault.cpp b/clients/default/kdedefault.cpp
index 115a59c976..b320629ddd 100644
--- a/clients/default/kdedefault.cpp
+++ b/clients/default/kdedefault.cpp
@@ -27,6 +27,9 @@
 
 using namespace KWinInternal;
 
+namespace
+{
+
 static unsigned char iconify_bits[] = {
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x78, 0x00, 0x78, 0x00, 0x78, 0x00,
   0x78, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
@@ -118,6 +121,8 @@ bool largeToolButtons;
 int	 toolTitleHeight;
 int	 normalTitleHeight;
 
+}
+
 // ===========================================================================
 
 KDEDefaultHandler::KDEDefaultHandler()