diff --git a/package/kernel/mac80211/Makefile b/package/kernel/mac80211/Makefile
index 8d9dc4efa97..b9c82c51cc4 100644
--- a/package/kernel/mac80211/Makefile
+++ b/package/kernel/mac80211/Makefile
@@ -16,7 +16,7 @@ PKG_SOURCE_URL:=http://mirror2.openwrt.org/sources/
 PKG_HASH:=3bbc461121134fda9089c084a5eed577d05e7837a157edf9a3797937172a3ece
 
 PKG_SOURCE:=backports-$(PKG_VERSION).tar.xz
-PKG_BUILD_DIR:=$(KERNEL_BUILD_DIR)/backports-$(PKG_VERSION)
+PKG_BUILD_DIR:=$(KERNEL_BUILD_DIR)/$(if $(BUILD_VARIANT),$(PKG_NAME)-$(BUILD_VARIANT)/)backports-$(PKG_VERSION)
 PKG_BUILD_PARALLEL:=1
 
 PKG_MAINTAINER:=Felix Fietkau <nbd@nbd.name>