diff --git a/core/assets/vendor/backbone/backbone-min.map b/core/assets/vendor/backbone/backbone-min.js.map
similarity index 100%
rename from core/assets/vendor/backbone/backbone-min.map
rename to core/assets/vendor/backbone/backbone-min.js.map
diff --git a/core/scripts/js/vendor-update.js b/core/scripts/js/vendor-update.js
index df014bab69f0..56f79e0759d6 100644
--- a/core/scripts/js/vendor-update.js
+++ b/core/scripts/js/vendor-update.js
@@ -77,7 +77,7 @@ const assetsFolder = `${coreFolder}/assets/vendor`;
     {
       pack: 'backbone',
       library: 'internal.backbone',
-      files: ['backbone.js', 'backbone-min.js', 'backbone-min.map'],
+      files: ['backbone.js', 'backbone-min.js', 'backbone-min.js.map'],
     },
     // Only used to update the version number of the deprecated library.
     {