diff --git a/addons/base_diagram/static/src/js/diagram.js b/addons/base_diagram/static/src/js/diagram.js
index cadf93a5f69..9bd9d7d36b5 100644
--- a/addons/base_diagram/static/src/js/diagram.js
+++ b/addons/base_diagram/static/src/js/diagram.js
@@ -303,15 +303,16 @@ openerp.base_diagram.DiagramView = openerp.base.View.extend({
 			form_fields = ['act_from', 'act_to'];
 		}
     	
-    	$.each(form_fields, function(index, fld) {
-			form_controller.on_record_loaded.add_first(function() {
-				form_controller.fields[fld].modifiers.readonly = true;
-				form_controller.fields[fld].$input.attr('disabled', true);
-	    		form_controller.fields[fld].$drop_down.unbind();
-	    		form_controller.fields[fld].$menu_btn.unbind();
+    	if(id) {
+	    	$.each(form_fields, function(index, fld) {
+				form_controller.on_record_loaded.add_first(function() {
+					form_controller.fields[fld].modifiers.readonly = true;
+					form_controller.fields[fld].$input.attr('disabled', true);
+		    		form_controller.fields[fld].$drop_down.unbind();
+		    		form_controller.fields[fld].$menu_btn.unbind();
+				});
 			});
-		});
-    	
+    	}
     	if(!id && (model == self.node)) {
     		$.each(form_fields, function(index, fld) {
     			form_controller.on_record_loaded.add_last(function() {