diff --git a/erpnext/crm/doctype/opportunity/opportunity.js b/erpnext/crm/doctype/opportunity/opportunity.js
index ebef4b4..7ccd015 100644
--- a/erpnext/crm/doctype/opportunity/opportunity.js
+++ b/erpnext/crm/doctype/opportunity/opportunity.js
@@ -20,6 +20,10 @@
 		frm.trigger('set_contact_link');
 	},
 
+	with_items: function(frm) {
+		frm.trigger('toggle_mandatory');
+	},
+
 	customer_address: function(frm, cdt, cdn) {
 		erpnext.utils.get_address_display(frm, 'customer_address', 'address_display', false);
 	},
@@ -35,6 +39,7 @@
 		var doc = frm.doc;
 		frm.events.enquiry_from(frm);
 		frm.trigger('set_contact_link');
+		frm.trigger('toggle_mandatory');
 		erpnext.toggle_naming_series();
 
 		if(!doc.__islocal && doc.status!=="Lost") {
@@ -84,6 +89,10 @@
 			method: "erpnext.crm.doctype.opportunity.opportunity.make_supplier_quotation",
 			frm: cur_frm
 		})
+	},
+
+	toggle_mandatory: function(frm) {
+		frm.toggle_reqd("items", frm.doc.with_items ? 1:0);
 	}
 })