diff --git a/ui/ui.datepicker.js b/ui/ui.datepicker.js
index a106ed291..b88460456 100644
--- a/ui/ui.datepicker.js
+++ b/ui/ui.datepicker.js
@@ -156,7 +156,7 @@ $.extend(Datepicker.prototype, {
 
 	/* Create a new instance object. */
 	_newInst: function(target, inline) {
-		var id = target[0].id.replace(/([:\[\]\.])/g, '\\\\$1'); // escape jQuery meta chars
+		var id = target[0].id.replace(/([:\[\]\.\$])/g, '\\\\$1'); // escape jQuery meta chars
 		return {id: id, input: target, // associated target
 			selectedDay: 0, selectedMonth: 0, selectedYear: 0, // current selection
 			drawMonth: 0, drawYear: 0, // month being drawn