diff --git a/core/server/helpers/ghost_head.js b/core/server/helpers/ghost_head.js
index d267d52180..0ae312f622 100644
--- a/core/server/helpers/ghost_head.js
+++ b/core/server/helpers/ghost_head.js
@@ -302,7 +302,7 @@ ghost_head = function (options) {
         schema,
         title = hbs.handlebars.Utils.escapeExpression(blog.title),
         context = self.context ? self.context[0] : null,
-        contextObject = self[context] || blog;
+        contextObject = _.cloneDeep(self[context] || blog);
 
     // Store Async calls in an object of named promises
     props.url = urlHelper.call(self, {hash: {absolute: true}});
diff --git a/core/test/unit/server_helpers/ghost_head_spec.js b/core/test/unit/server_helpers/ghost_head_spec.js
index a1c23b96af..b19dae5fca 100644
--- a/core/test/unit/server_helpers/ghost_head_spec.js
+++ b/core/test/unit/server_helpers/ghost_head_spec.js
@@ -2,6 +2,7 @@
 /*jshint expr:true*/
 var should         = require('should'),
     sinon          = require('sinon'),
+    _              = require('lodash'),
     Promise        = require('bluebird'),
     hbs            = require('express-hbs'),
     utils          = require('./utils'),
@@ -243,7 +244,7 @@ describe('{{ghost_head}} helper', function () {
                 image: '/content/images/test-author-image.png',
                 cover: '/content/images/author-cover-image.png',
                 website: 'http://authorwebsite.com'
-            };
+            }, authorBk = _.cloneDeep(author);
 
             helpers.ghost_head.call(
                 {safeVersion: '0.3', relativeUrl: '/author/AuthorName/', author: author, context: ['author']},
@@ -273,6 +274,8 @@ describe('{{ghost_head}} helper', function () {
                 rendered.string.should.match(/"name": "Author name"/);
                 rendered.string.should.match(/"description": "Author bio"/);
 
+                author.should.eql(authorBk);
+
                 done();
             }).catch(done);
         });
@@ -331,7 +334,7 @@ describe('{{ghost_head}} helper', function () {
                     website: 'http://authorwebsite.com',
                     bio: 'Author bio'
                 }
-            };
+            }, postBk = _.cloneDeep(post);
 
             helpers.ghost_head.call(
                 {relativeUrl: '/post/', safeVersion: '0.3', context: ['post'], post: post},
@@ -382,6 +385,8 @@ describe('{{ghost_head}} helper', function () {
                 rendered.string.should.match(/<meta name="generator" content="Ghost 0.3" \/>/);
                 rendered.string.should.match(/<link rel="alternate" type="application\/rss\+xml" title="Ghost" href="http:\/\/testurl.com\/rss\/" \/>/);
 
+                post.should.eql(postBk);
+
                 done();
             }).catch(done);
         });