diff --git a/ghost/image-transform/lib/transform.js b/ghost/image-transform/lib/transform.js
index b5a547368a..4cc96802f8 100644
--- a/ghost/image-transform/lib/transform.js
+++ b/ghost/image-transform/lib/transform.js
@@ -1,6 +1,7 @@
 const Promise = require('bluebird');
 const errors = require('@tryghost/errors');
 const fs = require('fs-extra');
+const path = require('path');
 
 /**
   * @NOTE: Sharp cannot operate on the same image path, that's why we have to use in & out paths.
@@ -80,6 +81,12 @@ const makeSafe = fn => (...args) => {
     });
 };
 
+const generateOriginalImageName = (originalPath) => {
+    const parsedFileName = path.parse(originalPath);
+    return path.join(parsedFileName.dir, `${parsedFileName.name}_o${parsedFileName.ext}`);
+};
+
+module.exports.generateOriginalImageName = generateOriginalImageName;
 module.exports.canTransformFileExtension = canTransformFileExtension;
 module.exports.resizeFromPath = makeSafe(unsafeResizeFromPath);
 module.exports.resizeFromBuffer = makeSafe(unsafeResizeFromBuffer);
diff --git a/ghost/image-transform/test/transform.test.js b/ghost/image-transform/test/transform.test.js
index 0e6e0cb93e..b9909aa00a 100644
--- a/ghost/image-transform/test/transform.test.js
+++ b/ghost/image-transform/test/transform.test.js
@@ -132,4 +132,13 @@ describe('Transform', function () {
                 });
         });
     });
+
+    describe('generateOriginalImageName', function () {
+        it('correctly adds suffix', function () {
+            transform.generateOriginalImageName('test.jpg').should.eql('test_o.jpg');
+            transform.generateOriginalImageName('content/images/test.jpg').should.eql('content/images/test_o.jpg');
+            transform.generateOriginalImageName('content/images/test_o.jpg').should.eql('content/images/test_o_o.jpg');
+            transform.generateOriginalImageName('content/images/test-1.jpg').should.eql('content/images/test-1_o.jpg');
+        });
+    });
 });