diff --git a/include/toplevel.mk b/include/toplevel.mk
index 24e4ebf823..c90670bee6 100644
--- a/include/toplevel.mk
+++ b/include/toplevel.mk
@@ -126,7 +126,7 @@ menuconfig: scripts/config/mconf prepare-tmpinfo FORCE
 	if [ \! -e .config -a -e $(HOME)/.openwrt/defconfig ]; then \
 		cp $(HOME)/.openwrt/defconfig .config; \
 	fi
-	$< Config.in
+	[ -L .config ] && export KCONFIG_OVERWRITECONFIG=1; $< Config.in
 
 prepare_kernel_conf: .config FORCE