diff --git a/package.xml b/package.xml
index 741cddc..4956eda 100644
--- a/package.xml
+++ b/package.xml
@@ -90,6 +90,7 @@ http://pear.php.net/dtd/package-2.0.xsd">
     <file role="test" name="async004.phpt" />
     <file role="test" name="async005.phpt" />
     <file role="test" name="async006.phpt" />
+    <file role="test" name="async007.phpt" />
     <file role="test" name="basic001.phpt" />
     <file role="test" name="basic002.phpt" />
     <file role="test" name="bound001.phpt" />
@@ -114,6 +115,7 @@ http://pear.php.net/dtd/package-2.0.xsd">
     <file role="test" name="reset001.phpt" />
     <file role="test" name="savepoint001.phpt" />
     <file role="test" name="stm_desc001.phpt" />
+    <file role="test" name="stm_desc002.phpt" />
     <file role="test" name="trans001.phpt" />
     <file role="test" name="trans002.phpt" />
     <file role="test" name="types001.phpt" />
diff --git a/src/php_pqres.c b/src/php_pqres.c
index addeab3..de33fd2 100644
--- a/src/php_pqres.c
+++ b/src/php_pqres.c
@@ -883,6 +883,25 @@ static PHP_METHOD(pqres, count) {
 	}
 }
 
+ZEND_BEGIN_ARG_INFO_EX(ai_pqres_desc, 0, 0, 0)
+ZEND_END_ARG_INFO();
+static PHP_METHOD(pqres, desc) {
+	if (SUCCESS == zend_parse_parameters_none()) {
+		php_pqres_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
+
+		if (!obj->intern) {
+			throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Result not initialized");
+		} else {
+			int p, params;
+
+			array_init(return_value);
+			for (p = 0, params = PQnparams(obj->intern->res); p < params; ++p) {
+				add_next_index_long(return_value, PQparamtype(obj->intern->res, p));
+			}
+		}
+	}
+}
+
 static zend_function_entry php_pqres_methods[] = {
 	PHP_ME(pqres, bind, ai_pqres_bind, ZEND_ACC_PUBLIC)
 	PHP_ME(pqres, fetchBound, ai_pqres_fetch_bound, ZEND_ACC_PUBLIC)
@@ -891,6 +910,7 @@ static zend_function_entry php_pqres_methods[] = {
 	PHP_ME(pqres, fetchAll, ai_pqres_fetch_all, ZEND_ACC_PUBLIC)
 	PHP_ME(pqres, count, ai_pqres_count, ZEND_ACC_PUBLIC)
 	PHP_ME(pqres, map, ai_pqres_map, ZEND_ACC_PUBLIC)
+	PHP_ME(pqres, desc, ai_pqres_desc, ZEND_ACC_PUBLIC)
 	{0}
 };
 
diff --git a/src/php_pqstm.c b/src/php_pqstm.c
index a0ae249..6be580c 100644
--- a/src/php_pqstm.c
+++ b/src/php_pqstm.c
@@ -113,7 +113,7 @@ static void php_pqstm_object_read_connection(zval *object, void *o, zval *return
 
 ZEND_BEGIN_ARG_INFO_EX(ai_pqstm_construct, 0, 0, 3)
 	ZEND_ARG_OBJ_INFO(0, Connection, pq\\Connection, 0)
-	ZEND_ARG_INFO(0, type)
+	ZEND_ARG_INFO(0, name)
 	ZEND_ARG_INFO(0, query)
 	ZEND_ARG_ARRAY_INFO(0, types, 1)
 	ZEND_ARG_INFO(0, async)
@@ -293,14 +293,16 @@ static PHP_METHOD(pqstm, desc) {
 	}
 }
 
-ZEND_BEGIN_ARG_INFO_EX(ai_pqstm_desc_async, 0, 0, 0)
+ZEND_BEGIN_ARG_INFO_EX(ai_pqstm_desc_async, 0, 0, 1)
+	ZEND_ARG_INFO(0, callable)
 ZEND_END_ARG_INFO();
 static PHP_METHOD(pqstm, descAsync) {
 	zend_error_handling zeh;
+	php_pq_callback_t resolver = {{0}};
 	STATUS rv;
 
 	zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
-	rv = zend_parse_parameters_none();
+	rv = zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "f", &resolver.fci, &resolver.fcc);
 	zend_restore_error_handling(&zeh TSRMLS_CC);
 
 	if (SUCCESS == rv) {
@@ -311,6 +313,11 @@ static PHP_METHOD(pqstm, descAsync) {
 		} else if (!PQsendDescribePrepared(obj->intern->conn->intern->conn, obj->intern->name)) {
 			throw_exce(EX_IO TSRMLS_CC, "Failed to describe statement: %s", PHP_PQerrorMessage(obj->intern->conn->intern->conn));
 		} else {
+			php_pq_callback_dtor(&obj->intern->conn->intern->onevent);
+			if (resolver.fci.size > 0) {
+				obj->intern->conn->intern->onevent = resolver;
+				php_pq_callback_addref(&obj->intern->conn->intern->onevent);
+			}
 			obj->intern->conn->intern->poller = PQconsumeInput;
 			php_pqconn_notify_listeners(obj->intern->conn TSRMLS_CC);
 		}
diff --git a/tests/async007.phpt b/tests/async007.phpt
new file mode 100644
index 0000000..c2a59f6
--- /dev/null
+++ b/tests/async007.phpt
@@ -0,0 +1,41 @@
+--TEST--
+async statement
+--SKIPIF--
+<?php include "_skipif.inc"; ?>
+--FILE--
+<?php
+echo "Test\n";
+include "_setup.inc";
+
+function complete($c) {
+	do {
+		while ($c->busy) {
+			$r = array($c->socket);
+			$w = $e = null;
+			if (stream_select($r, $w, $e, null)) {
+				$c->poll();
+			}
+		}
+	} while ($c->getResult());
+}
+
+$c = new pq\Connection(PQ_DSN);
+$t = new pq\Types($c);
+$s = new pq\Statement($c, "test1", "SELECT NOW() - \$1", null, true);
+complete($s->connection);
+
+$s->execAsync(array("2012-12-12 12:12:12"));
+complete($s->connection);
+
+$s->descAsync(function($r) use ($t) {
+	list($typeOid) = $r->desc();
+	printf("%s\n", $t[$typeOid]->typname);
+});
+complete($s->connection);
+
+?>
+DONE
+--EXPECT--
+Test
+timestamptz
+DONE
diff --git a/tests/stm_desc002.phpt b/tests/stm_desc002.phpt
new file mode 100644
index 0000000..32ab8b2
--- /dev/null
+++ b/tests/stm_desc002.phpt
@@ -0,0 +1,22 @@
+--TEST--
+desc statement
+--SKIPIF--
+<?php include "_skipif.inc"; ?>
+--FILE--
+<?php
+echo "Test\n";
+include "_setup.inc";
+
+$c = new pq\Connection(PQ_DSN);
+$s = new pq\Statement($c, "test1", "SELECT NOW() - \$1");
+$r = $s->exec(array("2012-12-12 12:12:12"));
+$d = $s->desc();
+
+printf("%s\n", (new pq\Types($c))[$d[0]]->typname);
+
+?>
+DONE
+--EXPECT--
+Test
+timestamptz
+DONE