diff --git a/src/mol-plugin-state/transforms/data.ts b/src/mol-plugin-state/transforms/data.ts
index c516f122f0fb843847e2a53863b2d47d1f703ef0..7c28a8c7b4be3e82d0b25ed8f8a85636641b04cf 100644
--- a/src/mol-plugin-state/transforms/data.ts
+++ b/src/mol-plugin-state/transforms/data.ts
@@ -51,7 +51,7 @@ const Download = PluginStateTransform.BuiltIn({
 })({
     apply({ params: p, cache }, plugin: PluginContext) {
         return Task.create('Download', async ctx => {
-            let url = Asset.getUrlAsset(plugin.managers.asset, p.url);
+            const url = Asset.getUrlAsset(plugin.managers.asset, p.url);
             const asset = await plugin.managers.asset.resolve(url, p.isBinary ? 'binary' : 'string').runInContext(ctx);
             (cache as any).asset = asset;
             return p.isBinary