diff --git a/web/src/engine/dom-utils/src/stylesheets.ts b/web/src/engine/dom-utils/src/stylesheets.ts
index 676db32a30..7312a62f05 100644
--- a/web/src/engine/dom-utils/src/stylesheets.ts
+++ b/web/src/engine/dom-utils/src/stylesheets.ts
@@ -91,7 +91,7 @@ export class StylesheetManager {
     const fontKey = fd.family;
     let source: string;
 
-    let i, ttf='', woff='', fList=[];
+    let i, ttf='', woff='', fList=[], data='';
 
     // TODO: 22 Aug 2014: check that font path passed from cloud is actually used!