diff --git a/lib/grape/endpoint.rb b/lib/grape/endpoint.rb
index 04deef72aa..f50084270e 100644
--- a/lib/grape/endpoint.rb
+++ b/lib/grape/endpoint.rb
@@ -404,8 +404,12 @@ def options?
         env[Grape::Http::Headers::REQUEST_METHOD] == Grape::Http::Headers::OPTIONS
     end
 
-    def method_missing(name, *args)
-      raise NoMethodError.new("undefined method `#{name}' for #{self.class} in `#{self.route.origin}' endpoint")
+    def method_missing(name, *_args)
+      raise NoMethodError.new("undefined method `#{name}' for #{self.class} in `#{route.origin}' endpoint")
+    end
+
+    def respond_to_missing?(method_name, include_private = false)
+      super
     end
   end
 end
diff --git a/spec/grape/endpoint_spec.rb b/spec/grape/endpoint_spec.rb
index 26f5af0fc5..5788bd9131 100644
--- a/spec/grape/endpoint_spec.rb
+++ b/spec/grape/endpoint_spec.rb
@@ -698,9 +698,9 @@ def app
         subject.get('/hey') do
           undefined_helper
         end
-        expect {
+        expect do
           get '/hey'
-        }.to raise_error(NoMethodError, /^undefined method `undefined_helper' for #<Class:0x[0-9a-fA-F]+> in `\/hey' endpoint/)
+        end.to raise_error(NoMethodError, %r{^undefined method `undefined_helper' for #<Class:0x[0-9a-fA-F]+> in `/hey' endpoint})
       end
     end
 
@@ -709,9 +709,9 @@ def app
         subject.get('/hey') do
           Object.new.x
         end
-        expect {
+        expect do
           get '/hey'
-        }.to raise_error(NoMethodError, /^undefined method `x' for #<Object:0x[0-9a-fA-F]+>$/)
+        end.to raise_error(NoMethodError, /^undefined method `x' for #<Object:0x[0-9a-fA-F]+>$/)
       end
     end
   end