diff --git a/lib/cartodb/controllers/map/anonymous.js b/lib/cartodb/controllers/map/anonymous.js
index a8b7f353..d90820c4 100644
--- a/lib/cartodb/controllers/map/anonymous.js
+++ b/lib/cartodb/controllers/map/anonymous.js
@@ -9,6 +9,7 @@ const credentials = require('../../middleware/credentials');
 const dbConnSetup = require('../../middleware/db-conn-setup');
 const authorize = require('../../middleware/authorize');
 const initProfiler = require('./middlewares/init-profiler');
+const checkJsonContentType = require('./middlewares/check-json-content-type');
 const cacheControlHeader = require('../../middleware/cache-control-header');
 const cacheChannelHeader = require('../../middleware/cache-channel-header');
 const surrogateKeyHeader = require('../../middleware/surrogate-key-header');
@@ -110,18 +111,6 @@ AnonymousMapController.prototype.composeCreateMapMiddleware = function () {
     ];
 };
 
-function checkJsonContentType () {
-    return function checkJsonContentTypeMiddleware(req, res, next) {
-        if (req.method === 'POST' && !req.is('application/json')) {
-            return next(new Error('POST data must be of type application/json'));
-        }
-
-        req.profiler.done('checkJsonContentTypeMiddleware');
-
-        next();
-    };
-}
-
 function checkCreateLayergroup () {
     return function checkCreateLayergroupMiddleware (req, res, next) {
         if (req.method === 'GET') {
diff --git a/lib/cartodb/controllers/map/middlewares/check-json-content-type.js b/lib/cartodb/controllers/map/middlewares/check-json-content-type.js
new file mode 100644
index 00000000..05aa6f26
--- /dev/null
+++ b/lib/cartodb/controllers/map/middlewares/check-json-content-type.js
@@ -0,0 +1,11 @@
+module.exports = function checkJsonContentType () {
+    return function checkJsonContentTypeMiddleware(req, res, next) {
+        if (req.method === 'POST' && !req.is('application/json')) {
+            return next(new Error('POST data must be of type application/json'));
+        }
+
+        req.profiler.done('checkJsonContentTypeMiddleware');
+
+        next();
+    };
+};
diff --git a/lib/cartodb/controllers/map/named.js b/lib/cartodb/controllers/map/named.js
index ecaf3917..73822421 100644
--- a/lib/cartodb/controllers/map/named.js
+++ b/lib/cartodb/controllers/map/named.js
@@ -5,6 +5,7 @@ const credentials = require('../../middleware/credentials');
 const dbConnSetup = require('../../middleware/db-conn-setup');
 const authorize = require('../../middleware/authorize');
 const initProfiler = require('./middlewares/init-profiler');
+const checkJsonContentType = require('./middlewares/check-json-content-type');
 const cacheControlHeader = require('../../middleware/cache-control-header');
 const cacheChannelHeader = require('../../middleware/cache-channel-header');
 const surrogateKeyHeader = require('../../middleware/surrogate-key-header');
@@ -120,18 +121,6 @@ NamedMapController.prototype.composeInstantiateTemplateMiddleware = function ()
     ];
 };
 
-function checkJsonContentType () {
-    return function checkJsonContentTypeMiddleware(req, res, next) {
-        if (req.method === 'POST' && !req.is('application/json')) {
-            return next(new Error('POST data must be of type application/json'));
-        }
-
-        req.profiler.done('checkJsonContentTypeMiddleware');
-
-        next();
-    };
-}
-
 function checkInstantiteLayergroup () {
     return function checkInstantiteLayergroupMiddleware(req, res, next) {
         if (req.method === 'GET') {