diff --git a/django/db/backends/postgresql_psycopg2/base.py b/django/db/backends/postgresql_psycopg2/base.py
index eee5258..67b73f3 100644
--- a/django/db/backends/postgresql_psycopg2/base.py
+++ b/django/db/backends/postgresql_psycopg2/base.py
@@ -63,12 +63,12 @@ class DatabaseWrapper(BaseDatabaseWrapper):
         super(DatabaseWrapper, self).__init__(*args, **kwargs)
 
         self.features = DatabaseFeatures()
-        if settings.DATABASE_OPTIONS.get('autocommit', False):
-          self.features.uses_autocommit = True
-          self._iso_level_0()
+        if self.settings_dict['DATABASE_OPTIONS'].get('autocommit', False):
+            self.features.uses_autocommit = True
+            self._iso_level_0()
         else:
-          self.features.uses_autocommit = False
-          self._iso_level_1()
+            self.features.uses_autocommit = False
+            self._iso_level_1()
         self.ops = DatabaseOperations()
         self.client = DatabaseClient(self)
         self.creation = DatabaseCreation(self)