diff --git a/frontend/templates/search.html b/frontend/templates/search.html
index 8f986b38..28cb0dfc 100644
--- a/frontend/templates/search.html
+++ b/frontend/templates/search.html
@@ -298,7 +298,7 @@
   }
 
   function escapeHtml(str) {
-    if (!str) return '';
+    if (str === null || str === undefined) return '';
     return String(str)
       .replace(/&/g, '&')
       .replace(/</g, '&lt;')