--- tests/sumset_test.c.orig	2018-09-15 17:00:47 UTC
+++ tests/sumset_test.c
@@ -26,7 +26,7 @@
 #include <assert.h>
 #include "librsync.h"
 #include "sumset.h"
-
+#include <stdio.h>
 /* Test driver for sumset.c. */
 int main(int argc, char **argv)
 {