diff --git a/tests/libtest/lib2032.c b/tests/libtest/lib2032.c
index f2acbc41a3..993626bb35 100644
--- a/tests/libtest/lib2032.c
+++ b/tests/libtest/lib2032.c
@@ -142,7 +142,7 @@ static CURLcode test_lib2032(char *URL)  /* libntlmconnect */
                   "testuser:testpass");
       easy_setopt(ntlm_easy[num_handles], CURLOPT_WRITEFUNCTION, callback);
       easy_setopt(ntlm_easy[num_handles], CURLOPT_WRITEDATA,
-                  ntlm_easy[num_handles]);
+                  (void *)(ntlm_easy + num_handles));
       easy_setopt(ntlm_easy[num_handles], CURLOPT_HEADER, 1L);
 
       multi_add_handle(multi, ntlm_easy[num_handles]);