diff --git a/lib/superstore/attribute_assignment.rb b/lib/superstore/attribute_assignment.rb
index 9150d05..5ee46a1 100644
--- a/lib/superstore/attribute_assignment.rb
+++ b/lib/superstore/attribute_assignment.rb
@@ -1,7 +1,12 @@
 module Superstore
   module AttributeAssignment
     def _assign_attribute(k, v)
-      public_send("#{k}=", v) if respond_to?("#{k}=")
+      setter = :"#{k}="
+      public_send(setter, v)
+    rescue NoMethodError
+      if respond_to?(setter)
+        raise
+      end
     end
   end
 end