diff --git a/lib/rails/generators/mongo_mapper/model/model_generator.rb b/lib/rails/generators/mongo_mapper/model/model_generator.rb
index a86f995df..128da3e97 100644
--- a/lib/rails/generators/mongo_mapper/model/model_generator.rb
+++ b/lib/rails/generators/mongo_mapper/model/model_generator.rb
@@ -18,6 +18,13 @@ def create_model_file
       end
 
       hook_for :test_framework
+
+      # Rails 3.0.X compatibility
+      unless methods.include?(:module_namespacing)
+        def module_namespacing(&block)
+          yield if block
+        end
+      end
     end
   end
 end
diff --git a/lib/rails/generators/mongo_mapper/model/templates/model.rb b/lib/rails/generators/mongo_mapper/model/templates/model.rb
index e614eb1ec..07fd7a9a8 100644
--- a/lib/rails/generators/mongo_mapper/model/templates/model.rb
+++ b/lib/rails/generators/mongo_mapper/model/templates/model.rb
@@ -10,4 +10,4 @@ class <%= class_name %>
 <% end -%>
 
 end
-<% end -%>
\ No newline at end of file
+<% end -%>