diff --git a/tests/unit/unit2600.c b/tests/unit/unit2600.c
index 534d1ea484..ad5dbb9d15 100644
--- a/tests/unit/unit2600.c
+++ b/tests/unit/unit2600.c
@@ -270,8 +270,10 @@ static void test_connect(struct test_case *tc)
   list = curl_slist_append(NULL, tc->resolve_info);
   fail_unless(list, "error allocating resolve list entry");
   curl_easy_setopt(easy, CURLOPT_RESOLVE, list);
-  curl_easy_setopt(easy, CURLOPT_CONNECTTIMEOUT_MS, tc->connect_timeout_ms);
-  curl_easy_setopt(easy, CURLOPT_HAPPY_EYEBALLS_TIMEOUT_MS, tc->he_timeout_ms);
+  curl_easy_setopt(easy, CURLOPT_CONNECTTIMEOUT_MS,
+                   (long)tc->connect_timeout_ms);
+  curl_easy_setopt(easy, CURLOPT_HAPPY_EYEBALLS_TIMEOUT_MS,
+                   (long)tc->he_timeout_ms);
 
   curl_easy_setopt(easy, CURLOPT_URL, tc->url);
   memset(&tr, 0, sizeof(tr));