diff --git a/lib/couchbase-orm/attributes/dynamic.rb b/lib/couchbase-orm/attributes/dynamic.rb
index cec07850..e5c29622 100644
--- a/lib/couchbase-orm/attributes/dynamic.rb
+++ b/lib/couchbase-orm/attributes/dynamic.rb
@@ -27,6 +27,7 @@ def respond_to?(name, include_private = false)
       #
       # @return [ Object ] value of attribute
     def _assign_attribute(name, value)
+      name = name.to_s
       responds = name.reader == 'id' || respond_to?(name.writer)
       if responds
         public_send(name.writer, value)