diff --git a/src/client/web/src/components/panel_files.tsx b/src/client/web/src/components/panel_files.tsx
index 2b1c03d..5f5e829 100644
--- a/src/client/web/src/components/panel_files.tsx
+++ b/src/client/web/src/components/panel_files.tsx
@@ -619,7 +619,7 @@ export class FilesPanel extends React.Component<Props, State, {}> {
         </div>
       );
 
-      const absDownloadURL = `${document.location.protocol}//${document.location.hostname}${downloadPath}`;
+      const absDownloadURL = `${document.location.protocol}//${document.location.hostname}:${document.location.port}${downloadPath}`;
       const pathTitle = this.props.msg.pkg.get("item.downloadURL");
       const modTimeTitle = this.props.msg.pkg.get("item.modTime");
       const sizeTitle = this.props.msg.pkg.get("item.size");