diff --git a/psycopg/adapter_list.c b/psycopg/adapter_list.c
index e22292b6..4f8349d1 100644
--- a/psycopg/adapter_list.c
+++ b/psycopg/adapter_list.c
@@ -47,7 +47,7 @@ list_quote(listObject *self)
     /*  list consisting of only NULL don't work with the ARRAY[] construct
      *  so we use the {NULL,...} syntax. The same syntax is also necessary
      *  to convert array of arrays containing only nulls. */
-    int all_nulls = 1;
+    int all_nulls = 0;
 
     Py_ssize_t i, len;
 
diff --git a/tests/test_types_basic.py b/tests/test_types_basic.py
index 781dc44e..8336cab4 100755
--- a/tests/test_types_basic.py
+++ b/tests/test_types_basic.py
@@ -272,6 +272,8 @@ class TypesBasicTests(ConnectingTestCase):
         ]:
             curs.execute("select %s::int[]", (a,))
             self.assertEqual(curs.fetchone()[0], a)
+            curs.execute("select array[%s]::int[]", (a,))
+            self.assertEqual(curs.fetchone()[0], [a])
 
     def testTypeRoundtripBytes(self):
         o1 = bytes(range(256))