diff --git a/sbin/ping/tests/Makefile b/sbin/ping/tests/Makefile
--- a/sbin/ping/tests/Makefile
+++ b/sbin/ping/tests/Makefile
@@ -1,5 +1,6 @@
 ATF_TESTS_C+=	in_cksum_test
-SRCS.in_cksum_test= in_cksum_test.c ../utils.c
+.PATH:	${.CURDIR:H}
+SRCS.in_cksum_test= in_cksum_test.c utils.c
 
 PACKAGE= tests