diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index b9d07ecfb424..9616fcb5343f 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2003-07-03 Uwe Stieber <uwe@kaos-group.de>
+
+	* config/kaos.h (CPP_PREDEFINES): Delete.
+	(TARGET_OS_CPP_BUILTINS): New.
+
 2003-07-03  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>
 
 	* c-aux-info.c: Include toplev.h after c-tree.h.
diff --git a/gcc/config/kaos.h b/gcc/config/kaos.h
index 98719ac2b282..45938da75c1b 100644
--- a/gcc/config/kaos.h
+++ b/gcc/config/kaos.h
@@ -19,8 +19,12 @@ along with GCC; see the file COPYING.  If not, write to
 the Free Software Foundation, 59 Temple Place - Suite 330,
 Boston, MA 02111-1307, USA.  */
 
-#undef CPP_PREDEFINES
-#define CPP_PREDEFINES "-D__kaOS__"
+/* Specify predefined symbols in preprocessor.  */
+#define TARGET_OS_CPP_BUILTINS()		\
+    do {					\
+	builtin_define ("__kaOS__");	\
+    } while (0)
+
 
 /* do not link any library implicitly for kaOS target.  */
 #undef LIB_SPEC