diff --git a/app.js b/app.js
index 51f2672..839067a 100644
--- a/app.js
+++ b/app.js
@@ -71,7 +71,7 @@ app.use('/messages', require('./routes/messages'));
 app.use('/account', require('./routes/account'));
 app.use('/contacts', require('./routes/contacts'));
 app.use('/ideas', require('./routes/ideas'));
-// vote for ideas, ... TODO to be generalized for not only ideas
+// vote for ideas, ...
 app.use('/ideas', require('./routes/votes'));
 app.use('/comments', require('./routes/votes'));
 
diff --git a/controllers/votes.js b/controllers/votes.js
index 0743163..195808a 100644
--- a/controllers/votes.js
+++ b/controllers/votes.js
@@ -26,11 +26,22 @@ async function post(req, res, next) {
     switch (e.code) {
       // duplicate vote
       case 409: {
-        return res.status(409).end();
+        return res.status(409).json({
+          errors: [{
+            status: 409,
+            detail: 'duplicate vote'
+          }]
+        });
       }
       // missing idea
       case 404: {
-        return res.status(404).end();
+        return res.status(404).json({
+          errors: [{
+            status: 404,
+            detail: `${primarys.slice(0, -1)} doesn't exist`
+          }]
+        });
+
       }
       default: {
         return next(e);
diff --git a/test/votes.js b/test/votes.js
index 24f99c0..7a46337 100644
--- a/test/votes.js
+++ b/test/votes.js
@@ -117,17 +117,31 @@ function voteTestFactory(primary, only=false) {
 
             voteBody.data.attributes.value = 1;
 
-            await agent
+            const response = await agent
               .post(`/${primarys}/${existentPrimary.id}/votes`)
               .send(voteBody)
               .expect(409);
+
+            should(response.body).deepEqual({
+              errors: [{
+                status: 409,
+                detail: 'duplicate vote'
+              }]
+            });
           });
 
           it(`[${primary} doesn't exist] 404`, async () => {
-            await agent
+            const response = await agent
               .post(`/${primarys}/1111111/votes`)
               .send(voteBody)
               .expect(404);
+
+            should(response.body).deepEqual({
+              errors: [{
+                status: 404,
+                detail: `${primary} doesn't exist`
+              }]
+            });
           });
         });