diff --git a/src/filerepository.js b/src/filerepository.js
index 839fbbb..2a68a9a 100644
--- a/src/filerepository.js
+++ b/src/filerepository.js
@@ -441,13 +441,13 @@ mix( FileLoader, ObservableMixin );
  * resolved with an object containing information about uploaded file:
  *
  *	{
- *		original: 'http://server/orginal-size.image.png'
+ *		default: 'http://server/default-size.image.png'
  *	}
  *
  * Additionally, other image sizes can be provided:
  *
  *	{
- *		original: 'http://server/orginal-size.image.png',
+ *		default: 'http://server/default-size.image.png',
  *		'160': 'http://server/size-160.image.png',
  *		'500': 'http://server/size-500.image.png',
  *		'1000': 'http://server/size-1000.image.png'
diff --git a/src/imageuploadengine.js b/src/imageuploadengine.js
index 983b6cc..a52c261 100644
--- a/src/imageuploadengine.js
+++ b/src/imageuploadengine.js
@@ -130,7 +130,7 @@ export default class ImageUploadEngine extends Plugin {
 			.then( data => {
 				doc.enqueueChanges( () => {
 					doc.batch( 'transparent' ).setAttribute( imageElement, 'uploadStatus', 'complete' );
-					doc.batch( 'transparent' ).setAttribute( imageElement, 'src', data.original );
+					doc.batch( 'transparent' ).setAttribute( imageElement, 'src', data.default );
 
 					// Srcset attribute for responsive images support.
 					const srcsetAttribute = Object.keys( data )
diff --git a/tests/imageuploadengine.js b/tests/imageuploadengine.js
index 079ac64..de4e28b 100644
--- a/tests/imageuploadengine.js
+++ b/tests/imageuploadengine.js
@@ -196,7 +196,7 @@ describe( 'ImageUploadEngine', () => {
 				done();
 			} );
 
-			adapterMock.mockSuccess( { original: 'image.png' } );
+			adapterMock.mockSuccess( { default: 'image.png' } );
 		} );
 
 		nativeReaderMock.mockSuccess( base64Sample );
@@ -354,7 +354,7 @@ describe( 'ImageUploadEngine', () => {
 				done();
 			} );
 
-			adapterMock.mockSuccess( { original: 'image.png', 500: 'image-500.png', 800: 'image-800.png' } );
+			adapterMock.mockSuccess( { default: 'image.png', 500: 'image-500.png', 800: 'image-800.png' } );
 		} );
 
 		nativeReaderMock.mockSuccess( base64Sample );
diff --git a/tests/imageuploadprogress.js b/tests/imageuploadprogress.js
index 5afa9d0..c32433d 100644
--- a/tests/imageuploadprogress.js
+++ b/tests/imageuploadprogress.js
@@ -118,7 +118,7 @@ describe( 'ImageUploadProgress', () => {
 				done();
 			} );
 
-			adapterMock.mockSuccess( { original: 'image.png' } );
+			adapterMock.mockSuccess( { default: 'image.png' } );
 		} );
 
 		nativeReaderMock.mockSuccess( base64Sample );
diff --git a/tests/manual/imageupload.js b/tests/manual/imageupload.js
index b4fb534..27489ab 100644
--- a/tests/manual/imageupload.js
+++ b/tests/manual/imageupload.js
@@ -75,7 +75,7 @@ function createProgressButton( loader, adapterMock ) {
 
 		if ( progress == total ) {
 			disableButtons();
-			adapterMock.mockSuccess( { original: './sample.jpg' } );
+			adapterMock.mockSuccess( { default: './sample.jpg' } );
 		}
 
 		progressInfo.innerHTML = `File: ${ fileName }. Progress: ${ loader.uploadedPercent }%.`;