diff --git a/lib/widget.js b/lib/widget.js
index a36afa7..2c9266e 100644
--- a/lib/widget.js
+++ b/lib/widget.js
@@ -6265,8 +6265,10 @@ function generateTags(style, text) {
       open = '{' + val + '-' + key + '}' + open;
       close += '{/' + val + '-' + key + '}';
     } else {
-      open = '{' + key + '}' + open;
-      close += '{/' + key + '}';
+      if (val) {
+        open = '{' + key + '}' + open;
+        close += '{/' + key + '}';
+      }
     }
   });