fix idset_test build broken in 2256993b27260cd7860c34b47751dff21a7083a8
diff --git a/regress/idset/Makefile b/regress/idset/Makefile
index 3783d35..c668822 100644
--- a/regress/idset/Makefile
+++ b/regress/idset/Makefile
@@ -1,7 +1,8 @@
.PATH:${.CURDIR}/../../lib
PROG = idset_test
-SRCS = error.c sha1.c object_idset.c inflate.c object_parse.c idset_test.c
+SRCS = error.c sha1.c object_idset.c inflate.c path.c object_parse.c \
+ idset_test.c
CPPFLAGS = -I${.CURDIR}/../../include -I${.CURDIR}/../../lib
LDADD = -lutil -lz