diff --git a/src/ol/source/Image.js b/src/ol/source/Image.js
index 7d5cf0e4ce..cf93b63ebe 100644
--- a/src/ol/source/Image.js
+++ b/src/ol/source/Image.js
@@ -15,7 +15,7 @@ import Source from './Source.js';
 /**
  * @enum {string}
  */
-const ImageSourceEventType = {
+export const ImageSourceEventType = {
 
   /**
    * Triggered when an image starts loading.