diff --git a/util/kconfig/Makefile b/util/kconfig/Makefile
index ab741139f7..243f763237 100644
--- a/util/kconfig/Makefile
+++ b/util/kconfig/Makefile
@@ -97,6 +97,9 @@ else
 	$< --defconfig=$(KBUILD_DEFCONFIG) $(Kconfig)
 endif
 
+olddefconfig: $(objk)/conf
+	$< --olddefconfig $(Kconfig)
+
 %_defconfig: $(objk)/conf
 	$< --defconfig=configs/$@ $(Kconfig)