diff --git a/package/network/services/wireguard/Makefile b/package/network/services/wireguard/Makefile
index 8a1e31031d2..9c0e075a177 100644
--- a/package/network/services/wireguard/Makefile
+++ b/package/network/services/wireguard/Makefile
@@ -21,7 +21,7 @@ PKG_HASH:=d9347786a9406ac276d86321ca64aadb1f0639cb0582c6e0519c634cf6e81157
 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