diff --git a/erpnext/public/js/projects/timer.js b/erpnext/public/js/projects/timer.js
index 8b1d1b1..26be997 100644
--- a/erpnext/public/js/projects/timer.js
+++ b/erpnext/public/js/projects/timer.js
@@ -44,8 +44,8 @@
 };
 
 erpnext.timesheet.control_timer = function(frm, dialog, row, timestamp=0) {
-	var $btn_start = $(".playpause .btn-start");
-	var $btn_complete = $(".playpause .btn-complete");
+	var $btn_start = dialog.$wrapper.find(".playpause .btn-start");
+	var $btn_complete = dialog.$wrapper.find(".playpause .btn-complete");
 	var interval = null;
 	var currentIncrement = timestamp;
 	var initialised = row ? true : false;