diff --git a/selling/doctype/opportunity/opportunity.js b/selling/doctype/opportunity/opportunity.js
index 606f9a78f3..00acf55153 100644
--- a/selling/doctype/opportunity/opportunity.js
+++ b/selling/doctype/opportunity/opportunity.js
@@ -54,7 +54,7 @@ erpnext.selling.Opportunity = wn.ui.form.Controller.extend({
 			});
 		}
 		
-		if(this.frm.doc.customer && !this.frm.doc.customer_name) cur_frm.cscript.customer(doc);
+		if(this.frm.doc.customer && !this.frm.doc.customer_name) cur_frm.cscript.customer(this.frm.doc);
 		
 		this.setup_queries();
 	},