diff --git a/django/contrib/postgres/operations.py b/django/contrib/postgres/operations.py
index b25438b826..7c28bc48ce 100644
--- a/django/contrib/postgres/operations.py
+++ b/django/contrib/postgres/operations.py
@@ -23,7 +23,7 @@ class CreateExtension(Operation):
             return
         if not self.extension_exists(schema_editor, self.name):
             schema_editor.execute(
-                'CREATE EXTENSION %s' % schema_editor.quote_name(self.name)
+                'CREATE EXTENSION IF NOT EXISTS %s' % schema_editor.quote_name(self.name)
             )
         # Clear cached, stale oids.
         get_hstore_oids.cache_clear()
@@ -38,7 +38,7 @@ class CreateExtension(Operation):
             return
         if self.extension_exists(schema_editor, self.name):
             schema_editor.execute(
-                'DROP EXTENSION %s' % schema_editor.quote_name(self.name)
+                'DROP EXTENSION IF EXISTS %s' % schema_editor.quote_name(self.name)
             )
         # Clear cached, stale oids.
         get_hstore_oids.cache_clear()
diff --git a/tests/postgres_tests/test_operations.py b/tests/postgres_tests/test_operations.py
index a10f5da440..114c141a61 100644
--- a/tests/postgres_tests/test_operations.py
+++ b/tests/postgres_tests/test_operations.py
@@ -183,13 +183,13 @@ class CreateExtensionTests(PostgreSQLTestCase):
             with connection.schema_editor(atomic=False) as editor:
                 operation.database_forwards(self.app_label, editor, project_state, new_state)
         self.assertEqual(len(captured_queries), 4)
-        self.assertIn('CREATE EXTENSION', captured_queries[1]['sql'])
+        self.assertIn('CREATE EXTENSION IF NOT EXISTS', captured_queries[1]['sql'])
         # Reversal.
         with CaptureQueriesContext(connection) as captured_queries:
             with connection.schema_editor(atomic=False) as editor:
                 operation.database_backwards(self.app_label, editor, new_state, project_state)
         self.assertEqual(len(captured_queries), 2)
-        self.assertIn('DROP EXTENSION', captured_queries[1]['sql'])
+        self.assertIn('DROP EXTENSION IF EXISTS', captured_queries[1]['sql'])
 
     def test_create_existing_extension(self):
         operation = BloomExtension()