diff --git a/boot/uboot/uboot.mk b/boot/uboot/uboot.mk
index bddafe234d..a19cb72458 100644
--- a/boot/uboot/uboot.mk
+++ b/boot/uboot/uboot.mk
@@ -449,6 +449,7 @@ endif # BR2_TARGET_UBOOT && BR_BUILDING
 ifeq ($(BR2_TARGET_UBOOT_BUILD_SYSTEM_LEGACY),y)
 $(eval $(generic-package))
 else ifeq ($(BR2_TARGET_UBOOT_BUILD_SYSTEM_KCONFIG),y)
+UBOOT_MAKE_ENV = $(TARGET_MAKE_ENV)
 UBOOT_KCONFIG_DEPENDENCIES = \
 	$(BR2_BISON_HOST_DEPENDENCY) \
 	$(BR2_FLEX_HOST_DEPENDENCY)