diff --git a/packages/netlify-cms-core/src/reducers/mediaLibrary.ts b/packages/netlify-cms-core/src/reducers/mediaLibrary.ts
index b72196d1..e2a6cbb1 100644
--- a/packages/netlify-cms-core/src/reducers/mediaLibrary.ts
+++ b/packages/netlify-cms-core/src/reducers/mediaLibrary.ts
@@ -71,6 +71,7 @@ const mediaLibrary = (state = Map(defaultState), action: MediaLibraryAction) =>
           privateUpload,
           config: libConfig,
           controlMedia: Map(),
+          displayURLs: Map(),
           field,
         });
       }