diff --git a/async.c b/async.c
index 507bdf2b..1e591205 100644
--- a/async.c
+++ b/async.c
@@ -343,8 +343,9 @@ void *async_loop(void *arg1) {
 						runqueue_push(uwsgi.wsgi_req);
 						continue;
 					}
-					else if (proto_parser_status == -1) {
-						uwsgi_log("error parsing request\n");
+					else if (proto_parser_status < 0) {
+						if (proto_parser_status == -1)
+							uwsgi_log("error parsing request\n");
 						uwsgi.async_proto_fd_table[interesting_fd] = NULL;
 						close(interesting_fd);
 						continue;
diff --git a/plugins/python/wsgi_handlers.c b/plugins/python/wsgi_handlers.c
index bb818b39..9ed6fd84 100644
--- a/plugins/python/wsgi_handlers.c
+++ b/plugins/python/wsgi_handlers.c
@@ -341,6 +341,7 @@ int uwsgi_request_wsgi(struct wsgi_request *wsgi_req) {
 
 #ifdef UWSGI_ASYNC
 	if (wsgi_req->async_status == UWSGI_AGAIN) {
+		UWSGI_GET_GIL
 		// get rid of timeout
 		if (wsgi_req->async_timed_out) {
 			PyDict_SetItemString(wsgi_req->async_environ, "x-wsgiorg.fdevent.timeout", Py_True);
@@ -357,7 +358,9 @@ int uwsgi_request_wsgi(struct wsgi_request *wsgi_req) {
 		else {
 			PyDict_SetItemString(wsgi_req->async_environ, "uwsgi.ready_fd", Py_None);
 		}
-		return manage_python_response(wsgi_req);
+		int ret = manage_python_response(wsgi_req);
+		UWSGI_RELEASE_GIL
+		return ret;
 	}
 #endif
 
@@ -455,6 +458,7 @@ int uwsgi_request_wsgi(struct wsgi_request *wsgi_req) {
 		while (wi->response_subhandler(wsgi_req) != UWSGI_OK) {
 #ifdef UWSGI_ASYNC
 			if (uwsgi.async > 1) {
+				UWSGI_RELEASE_GIL
 				return UWSGI_AGAIN;
 			}
 			else {
diff --git a/proto/http.c b/proto/http.c
index d4902692..ed39d8a6 100644
--- a/proto/http.c
+++ b/proto/http.c
@@ -262,7 +262,7 @@ int uwsgi_proto_http_parser(struct wsgi_request *wsgi_req) {
 	int j;
 	char *ptr;
 	ssize_t remains;
-	// make this buffer configurable
+	// TODO make this buffer configurable
 	char post_buf[8192];
 	char *post_tail = NULL;
 
diff --git a/tests/sleepthreadasync.py b/tests/sleepthreadasync.py
new file mode 100644
index 00000000..ebc759a5
--- /dev/null
+++ b/tests/sleepthreadasync.py
@@ -0,0 +1,18 @@
+import uwsgi
+import threading
+import time
+
+def foo():
+    while True:
+        time.sleep(1)
+        print "ciao, sono un thread"
+
+t = threading.Thread(target=foo)
+t.daemon=True
+t.start()
+def application(e, s):
+    s('200 OK', [('Content-Type','text/html')])
+    for i in range(0,3):
+        yield uwsgi.async_sleep(1)
+        yield "iter: %d<br/>" % i
+