diff --git a/curl-7.20.1-threaded-dns-multi.patch b/curl-7.20.1-threaded-dns-multi.patch
new file mode 100644
index 0000000..e7be86e
--- /dev/null
+++ b/curl-7.20.1-threaded-dns-multi.patch
@@ -0,0 +1,40 @@
+ lib/multi.c |   17 ++++++++++++++++-
+ 1 files changed, 16 insertions(+), 1 deletions(-)
+
+diff --git a/lib/multi.c b/lib/multi.c
+index 476cb81..74eb0f4 100644
+--- a/lib/multi.c
++++ b/lib/multi.c
+@@ -933,9 +933,16 @@ static CURLMcode multi_runsingle(struct Curl_multi *multi,
+         easy->result = addHandleToSendOrPendPipeline(easy->easy_handle,
+                                                      easy->easy_conn);
+         if(CURLE_OK == easy->result) {
+-          if(async)
++          if(async) {
+             /* We're now waiting for an asynchronous name lookup */
+             multistate(easy, CURLM_STATE_WAITRESOLVE);
++#ifdef USE_THREADS_POSIX
++            /* Curl_resolv_getsock() is not properly implemented in case
++             * we use POSIX threaded DNS resolver, we have to hang */
++            result = CURLM_CALL_MULTI_PERFORM;
++            break;
++#endif
++          }
+           else {
+             /* after the connect has been sent off, go WAITCONNECT unless the
+                protocol connect is already done and we can go directly to
+@@ -1003,6 +1010,14 @@ static CURLMcode multi_runsingle(struct Curl_multi *multi,
+         disconnect_conn = TRUE;
+         break;
+       }
++#ifdef USE_THREADS_POSIX
++      /* Curl_resolv_getsock() is not properly implemented yet in case
++       * we use POSIX threaded DNS resolver, we have to hang */
++      Curl_socket_ready(CURL_SOCKET_BAD, CURL_SOCKET_BAD, 100 /* ms */);
++      result = CURLM_CALL_MULTI_PERFORM;
++      break;
++#endif
++
+     }
+     break;
+ 
diff --git a/curl.spec b/curl.spec
index b6d2051..0f35ff7 100644
--- a/curl.spec
+++ b/curl.spec
@@ -7,6 +7,9 @@ Group: Applications/Internet
 Source: http://curl.haxx.se/download/%{name}-%{version}.tar.lzma
 Source2: curlbuild.h
 
+# experimentally enabled threaded DNS lookup
+Patch1: curl-7.20.1-threaded-dns-multi.patch
+
 # patch making libcurl multilib ready (by excluding static libraries)
 Patch101: curl-7.15.3-multilib.patch
 
@@ -95,6 +98,9 @@ for f in CHANGES README; do
     mv -f ${f}.utf8 ${f}
 done
 
+# upstream patches (not yet applied)
+%patch1 -p1
+
 # Fedora patches
 %patch101 -p1
 %patch102 -p1