--- a/src/pyams_security/widget/templates/principals-set-display.pt	Sat Feb 28 15:23:57 2015 +0100
+++ b/src/pyams_security/widget/templates/principals-set-display.pt	Sat Feb 28 15:25:05 2015 +0100
@@ -1,11 +1,12 @@
 <input type="hidden" autocomplete="off" readonly
 	data-ams-select2-multiple="true"
+	data-ams-select2-separator="|"
 	tal:attributes="id view/id;
 					name view/name;
 					class string:select2 ${view/klass};
 					style view/style;
 					title view/title;
-					value python:','.join((value.id for value in view.value));
+					value python:'|'.join((value.id for value in view.value));
 					lang view/lang;
 					onclick view/onclick;
 					ondblclick view/ondblclick;