diff --git a/django/db/backends/postgresql/schema.py b/django/db/backends/postgresql/schema.py
index 2dbd9e28a1..894314d89c 100644
--- a/django/db/backends/postgresql/schema.py
+++ b/django/db/backends/postgresql/schema.py
@@ -23,7 +23,7 @@ class DatabaseSchemaEditor(BaseDatabaseSchemaEditor):
     sql_delete_procedure = 'DROP FUNCTION %(procedure)s(%(param_types)s)'
 
     def quote_value(self, value):
-        return psycopg2.extensions.adapt(value)
+        return psycopg2.extensions.adapt(value).getquoted().decode()
 
     def _field_indexes_sql(self, model, field):
         output = super()._field_indexes_sql(model, field)