diff --git a/bin/test/test.c b/bin/test/test.c
index 5d711a289ab..8007a47af79 100644
--- a/bin/test/test.c
+++ b/bin/test/test.c
@@ -22,6 +22,7 @@ static const char rcsid[] =
 #include <err.h>
 #include <errno.h>
 #include <limits.h>
+#include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>