diff --git a/rest_framework/relations.py b/rest_framework/relations.py
index 884b954c4..c7256587e 100644
--- a/rest_framework/relations.py
+++ b/rest_framework/relations.py
@@ -442,7 +442,7 @@ class HyperlinkedRelatedField(RelatedField):
             raise Exception('Writable related fields must include a `queryset` argument')
 
         try:
-            http_prefix = value.startswith('http:') or value.startswith('https:')
+            http_prefix = value.startswith(('http:', 'https:'))
         except AttributeError:
             msg = self.error_messages['incorrect_type']
             raise ValidationError(msg % type(value).__name__)