diff --git a/package/lean/openwrt-fullconenat/Makefile b/package/lean/openwrt-fullconenat/Makefile
index aa1c02b1d9..279c1eb9a2 100644
--- a/package/lean/openwrt-fullconenat/Makefile
+++ b/package/lean/openwrt-fullconenat/Makefile
@@ -55,7 +55,7 @@ define Build/Compile
 	+$(MAKE) $(PKG_JOBS) -C "$(LINUX_DIR)" \
         CROSS_COMPILE="$(TARGET_CROSS)" \
         ARCH="$(LINUX_KARCH)" \
-        SUBDIRS="$(PKG_BUILD_DIR)" \
+        M="$(PKG_BUILD_DIR)" \
         EXTRA_CFLAGS="$(BUILDFLAGS)" \
         modules
 	$(call Build/Compile/Default)