diff --git a/cf/broken-getaddrinfo.m4 b/cf/broken-getaddrinfo.m4
index 75cbcb255..6d34f3b77 100644
--- a/cf/broken-getaddrinfo.m4
+++ b/cf/broken-getaddrinfo.m4
@@ -19,6 +19,8 @@ main(int argc, char **argv)
 	hints.ai_family = PF_UNSPEC;
 	if(getaddrinfo(NULL, "17", &hints, &ai) != 0)
 		return 1;
+	if(getaddrinfo(NULL, "0", &hints, &ai) != 0)
+		return 1;
 	return 0;
 }
 ]])],[ac_cv_func_getaddrinfo_numserv=yes],[ac_cv_func_getaddrinfo_numserv=no]))])