diff -Nru a/arch/ppc64/Kconfig b/arch/ppc64/Kconfig
--- a/arch/ppc64/Kconfig	Thu Dec 11 20:10:55 2003
+++ b/arch/ppc64/Kconfig	Thu Dec 11 20:10:55 2003
@@ -369,6 +369,8 @@
 	  unless you really know what this hack does.

 choice
+	optional
+	depends on DEBUG_KERNEL
 	prompt "Kernel Debugger"

 config XMON