diff --git a/lib/hostthre.c b/lib/hostthre.c
index 6a35244eed68593cf0fc66883bdfd3804e6e8dab..6f2182e03e0eb63967257fa4bd57804dfe20287c 100644
--- a/lib/hostthre.c
+++ b/lib/hostthre.c
@@ -498,7 +498,7 @@ Curl_addrinfo *Curl_getaddrinfo(struct connectdata *conn,
 
   /* see if we have an IPv6 stack */
   s = socket(PF_INET6, SOCK_DGRAM, 0);
-  if (s != CURL_SOCKET_BAD) {
+  if (s == CURL_SOCKET_BAD) {
     /* Some non-IPv6 stacks have been found to make very slow name resolves
      * when PF_UNSPEC is used, so thus we switch to a mere PF_INET lookup if
      * the stack seems to be a non-ipv6 one. */