diff --git a/lib/monads/monad.rb b/lib/monads/monad.rb
index 26e0bbd..8db637c 100644
--- a/lib/monads/monad.rb
+++ b/lib/monads/monad.rb
@@ -12,6 +12,10 @@ def method_missing(*args, &block)
       end
     end
 
+    def respond_to_missing?(method_name, include_all = false)
+      value.respond_to? method_name, include_all
+    end
+
     private
 
     def ensure_monadic_result(&block)
diff --git a/spec/monads/optional_spec.rb b/spec/monads/optional_spec.rb
index 2ae6e46..6178d31 100644
--- a/spec/monads/optional_spec.rb
+++ b/spec/monads/optional_spec.rb
@@ -94,6 +94,10 @@ module Monads
       it 'returns the message’s result wrapped in an Optional' do
         expect(optional.challenge.value).to eq response
       end
+
+      it 'correctly indicated whether a value can respond to a message' do
+        expect(optional).to respond_to :challenge
+      end
     end
   end
 end