diff --git a/lib/hostip.c b/lib/hostip.c
index f88dfbd77f86..2bb8638ef54b 100644
--- a/lib/hostip.c
+++ b/lib/hostip.c
@@ -935,10 +935,12 @@ CURLcode Curl_resolv(struct Curl_easy *data,
     return CURLE_OK;
   }
   else if(respwait) {
+#ifdef USE_CURL_ASYNC
     if(!Curl_resolv_check(data, &dns)) {
       *entry = dns;
       return dns ? CURLE_OK : CURLE_AGAIN;
     }
+#endif
     result = CURLE_COULDNT_RESOLVE_HOST;
   }
 error: