diff --git a/lib/cartodb/controllers/map/anonymous.js b/lib/cartodb/controllers/map/anonymous.js
index 665ba799..b90c6d0b 100644
--- a/lib/cartodb/controllers/map/anonymous.js
+++ b/lib/cartodb/controllers/map/anonymous.js
@@ -19,6 +19,7 @@ const lastUpdatedTimeLayergroup = require('./middlewares/last-updated-time-layer
 const layerStats = require('./middlewares/layer-stats');
 const layergroupIdHeader = require('./middlewares/layergroup-id-header');
 const layergroupMetadata = require('./middlewares/layergroup-metadata');
+const mapError = require('./middlewares/map-error');
 const sendResponse = require('../../middleware/send-response');
 const CreateLayergroupMapConfigProvider = require('../../models/mapconfig/provider/create-layergroup-provider');
 const LayergroupMetadata = require('../../utils/layergroup-metadata');
@@ -108,7 +109,7 @@ AnonymousMapController.prototype.composeCreateMapMiddleware = function () {
         layergroupIdHeader(this.templateMaps ,useTemplateHash),
         layergroupMetadata(this.layergroupMetadata, includeQuery),
         sendResponse(),
-        augmentError({ label, addContext })
+        mapError({ label, addContext })
     ];
 };
 
@@ -215,39 +216,3 @@ function createLayergroup (mapBackend, userLimitsApi, pgConnection, affectedTabl
         });
     };
 }
-
-function augmentError (options) {
-    const { addContext = false, label = 'MAPS CONTROLLER' } = options;
-
-    return function augmentErrorMiddleware (err, req, res, next) {
-        req.profiler.done('error');
-        const { mapConfig } = res.locals;
-
-        if (addContext) {
-            err = Number.isFinite(err.layerIndex) ? populateError(err, mapConfig) : err;
-        }
-
-        err.label = label;
-
-        next(err);
-    };
-}
-
-function populateError(err, mapConfig) {
-    var error = new Error(err.message);
-    error.http_status = err.http_status;
-
-    if (!err.http_status && err.message.indexOf('column "the_geom_webmercator" does not exist') >= 0) {
-        error.http_status = 400;
-    }
-
-    error.type = 'layer';
-    error.subtype = err.message.indexOf('Postgis Plugin') >= 0 ? 'query' : undefined;
-    error.layer = {
-        id: mapConfig.getLayerId(err.layerIndex),
-        index: err.layerIndex,
-        type: mapConfig.layerType(err.layerIndex)
-    };
-
-    return error;
-}
diff --git a/lib/cartodb/controllers/map/middlewares/map-error.js b/lib/cartodb/controllers/map/middlewares/map-error.js
new file mode 100644
index 00000000..6d87a93d
--- /dev/null
+++ b/lib/cartodb/controllers/map/middlewares/map-error.js
@@ -0,0 +1,35 @@
+module.exports = function mapError (options) {
+    const { addContext = false, label = 'MAPS CONTROLLER' } = options;
+
+    return function mapErrorMiddleware (err, req, res, next) {
+        req.profiler.done('error');
+        const { mapConfig } = res.locals;
+
+        if (addContext) {
+            err = Number.isFinite(err.layerIndex) ? populateError(err, mapConfig) : err;
+        }
+
+        err.label = label;
+
+        next(err);
+    };
+};
+
+function populateError(err, mapConfig) {
+    var error = new Error(err.message);
+    error.http_status = err.http_status;
+
+    if (!err.http_status && err.message.indexOf('column "the_geom_webmercator" does not exist') >= 0) {
+        error.http_status = 400;
+    }
+
+    error.type = 'layer';
+    error.subtype = err.message.indexOf('Postgis Plugin') >= 0 ? 'query' : undefined;
+    error.layer = {
+        id: mapConfig.getLayerId(err.layerIndex),
+        index: err.layerIndex,
+        type: mapConfig.layerType(err.layerIndex)
+    };
+
+    return error;
+}
diff --git a/lib/cartodb/controllers/map/named.js b/lib/cartodb/controllers/map/named.js
index 5707053a..b29cb06f 100644
--- a/lib/cartodb/controllers/map/named.js
+++ b/lib/cartodb/controllers/map/named.js
@@ -1,4 +1,3 @@
-const _ = require('underscore');
 const ResourceLocator = require('../../models/resource-locator');
 const cleanUpQueryParams = require('../../middleware/clean-up-query-params');
 const credentials = require('../../middleware/credentials');
@@ -16,6 +15,7 @@ const lastUpdatedTimeLayergroup = require('./middlewares/last-updated-time-layer
 const layerStats = require('./middlewares/layer-stats');
 const layergroupIdHeader = require('./middlewares/layergroup-id-header');
 const layergroupMetadata = require('./middlewares/layergroup-metadata');
+const mapError = require('./middlewares/map-error');
 const sendResponse = require('../../middleware/send-response');
 const NamedMapMapConfigProvider = require('../../models/mapconfig/provider/named-map-provider');
 const CreateLayergroupMapConfigProvider = require('../../models/mapconfig/provider/create-layergroup-provider');
@@ -119,7 +119,7 @@ NamedMapController.prototype.composeInstantiateTemplateMiddleware = function ()
         layergroupIdHeader(this.templateMaps ,useTemplateHash),
         layergroupMetadata(this.layergroupMetadata, includeQuery),
         sendResponse(),
-        augmentError({ label, addContext })
+        mapError({ label, addContext })
     ];
 };
 
@@ -222,39 +222,3 @@ function instantiateLayergroup (mapBackend, userLimitsApi, pgConnection, affecte
         });
     };
 }
-
-function augmentError (options) {
-    const { addContext = false, label = 'MAPS CONTROLLER' } = options;
-
-    return function augmentErrorMiddleware (err, req, res, next) {
-        req.profiler.done('error');
-        const { mapConfig } = res.locals;
-
-        if (addContext) {
-            err = Number.isFinite(err.layerIndex) ? populateError(err, mapConfig) : err;
-        }
-
-        err.label = label;
-
-        next(err);
-    };
-}
-
-function populateError(err, mapConfig) {
-    var error = new Error(err.message);
-    error.http_status = err.http_status;
-
-    if (!err.http_status && err.message.indexOf('column "the_geom_webmercator" does not exist') >= 0) {
-        error.http_status = 400;
-    }
-
-    error.type = 'layer';
-    error.subtype = err.message.indexOf('Postgis Plugin') >= 0 ? 'query' : undefined;
-    error.layer = {
-        id: mapConfig.getLayerId(err.layerIndex),
-        index: err.layerIndex,
-        type: mapConfig.layerType(err.layerIndex)
-    };
-
-    return error;
-}