diff --git a/src/ol/format/IIIFInfo.js b/src/ol/format/IIIFInfo.js
index fd27433e07..064333ad1b 100644
--- a/src/ol/format/IIIFInfo.js
+++ b/src/ol/format/IIIFInfo.js
@@ -70,6 +70,9 @@ const IIIF_PROFILE_VALUES = {
   }
 };
 
+/**
+ * @enum {string}
+ */
 export const Versions = {
   VERSION1: 'version1',
   VERSION2: 'version2',