diff --git a/include/u-boot.mk b/include/u-boot.mk
index 8945e8e2b8..2b8106410f 100644
--- a/include/u-boot.mk
+++ b/include/u-boot.mk
@@ -83,6 +83,9 @@ endef
 
 define Build/Configure/U-Boot
 	+$(MAKE) $(PKG_JOBS) -C $(PKG_BUILD_DIR) $(UBOOT_CONFIGURE_VARS) $(UBOOT_CONFIG)_config
+	$(if $(strip $(UBOOT_CUSTOMIZE_CONFIG)),
+		$(PKG_BUILD_DIR)/scripts/config --file $(PKG_BUILD_DIR)/.config $(UBOOT_CUSTOMIZE_CONFIG)
+		+$(MAKE) $(PKG_JOBS) -C $(PKG_BUILD_DIR) $(UBOOT_CONFIGURE_VARS) oldconfig)
 endef
 
 DTC=$(wildcard $(LINUX_DIR)/scripts/dtc/dtc)