diff --git a/rest_framework/fields.py b/rest_framework/fields.py
index b63354ba4..2efe89610 100644
--- a/rest_framework/fields.py
+++ b/rest_framework/fields.py
@@ -1449,7 +1449,7 @@ class FileField(Field):
         if not value:
             return None
 
-	use_url = getattr(self, 'use_url', api_settings.UPLOADED_FILES_USE_URL)
+        use_url = getattr(self, 'use_url', api_settings.UPLOADED_FILES_USE_URL)
 
         if use_url:
             if not getattr(value, 'url', None):