diff --git a/package/network/services/wireguard/Makefile b/package/network/services/wireguard/Makefile
index f9ed6baf8e..9be2a4c197 100644
--- a/package/network/services/wireguard/Makefile
+++ b/package/network/services/wireguard/Makefile
@@ -21,7 +21,7 @@ PKG_HASH:=096b6482a65e566c7bf8c059f5ee6aadb2de565b04b6d810c685f1c377540325
 PKG_LICENSE:=GPL-2.0 Apache-2.0
 PKG_LICENSE_FILES:=COPYING
 
-PKG_BUILD_DIR:=$(BUILD_DIR)/WireGuard-$(PKG_VERSION)
+PKG_BUILD_DIR:=$(KERNEL_BUILD_DIR)/WireGuard-$(PKG_VERSION)
 PKG_BUILD_PARALLEL:=1
 PKG_USE_MIPS16:=0