diff --git a/tests/unit/unit2605.c b/tests/unit/unit2605.c
index 0f6e8cb009..d26c8a1299 100644
--- a/tests/unit/unit2605.c
+++ b/tests/unit/unit2605.c
@@ -78,7 +78,7 @@ static CURLcode test_unit2605(const char *arg)
       curl_off_t start;
       curl_off_t size;
       CURLcode result;
-      curl_mprintf("%u: '%s' (file size: %" FMT_OFF_T ")\n", i, list[i].r,
+      curl_mprintf("%d: '%s' (file size: %" FMT_OFF_T ")\n", i, list[i].r,
                    list[i].filesize);
       result = Curl_ssh_range(curl, list[i].r, list[i].filesize, &start,
                               &size);