diff --git a/lib/libthr/arch/sparc64/Makefile.inc b/lib/libthr/arch/sparc64/Makefile.inc
new file mode 100644
index 000000000000..24aa2ef9bf83
--- /dev/null
+++ b/lib/libthr/arch/sparc64/Makefile.inc
@@ -0,0 +1,3 @@
+# $FreeBSD$
+
+.PATH:	${.CURDIR}/sys ${.CURDIR}/arch/${MACHINE_ARCH}/${MACHINE_ARCH}