diff --git a/package/swupdate/swupdate.mk b/package/swupdate/swupdate.mk
index d29f817355..5917c93f6a 100644
--- a/package/swupdate/swupdate.mk
+++ b/package/swupdate/swupdate.mk
@@ -223,7 +223,7 @@ SWUPDATE_KCONFIG_FILE = $(call qstrip,$(BR2_PACKAGE_SWUPDATE_CONFIG))
 SWUPDATE_KCONFIG_EDITORS = menuconfig xconfig gconfig nconfig
 
 SWUPDATE_MAKE_OPTS = \
-	SWU_VER="$(SWUPDATE_VERSION) (Buildroot $(BR2_VERSION_FULL))"
+	SWU_VER="$(SWUPDATE_VERSION) (Buildroot $(BR2_VERSION_FULL))" \
 	CROSS_COMPILE="$(TARGET_CROSS)" \
 	CONFIG_EXTRA_CFLAGS="$(TARGET_CFLAGS)" \
 	CONFIG_EXTRA_LDFLAGS="$(TARGET_LDFLAGS)"