diff --git a/stone/backends/obj_c_helpers.py b/stone/backends/obj_c_helpers.py
index f9f5f685..50440304 100644
--- a/stone/backends/obj_c_helpers.py
+++ b/stone/backends/obj_c_helpers.py
@@ -150,6 +150,7 @@
     'description',
     'id',
     'delete',
+    'hash',
 }
 
 _reserved_prefixes = {