diff --git a/Makefile b/Makefile
index cb15217..aba8a62 100644
--- a/Makefile
+++ b/Makefile
@@ -260,7 +260,7 @@
 endef
 
 $(OUT)autoconf.h : $(KCONFIG_CONFIG) ; $(call do-kconfig, silentoldconfig)
-$(KCONFIG_CONFIG): src/Kconfig vgasrc/Kconfig ; $(call do-kconfig, defconfig)
+$(KCONFIG_CONFIG): src/Kconfig vgasrc/Kconfig ; $(call do-kconfig, olddefconfig)
 %onfig: ; $(call do-kconfig, $@)
 help: ; $(call do-kconfig, $@)