diff --git a/oform/format/UserMaster.js b/oform/format/UserMaster.js
index e5b4561..37d7138 100644
--- a/oform/format/UserMaster.js
+++ b/oform/format/UserMaster.js
@@ -134,6 +134,10 @@
 	{
 		return this.Role ? this.Role : "";
 	};
+	CUserMaster.prototype.isNoRole = function()
+	{
+		return (this === AscOForm.getNoRole());
+	};
 	CUserMaster.prototype.setColor = function(r, g, b)
 	{
 		let newColor = undefined !== r && null !== r ? new AscWord.CDocumentColor(r, g, b) : undefined;