closes #5827

public/src/admin/manage/users.js

@@ -99,7 +99,7 @@ define('admin/manage/users', ['translator'], function (translator) {
 									data[cur.name] = cur.value;
 									return data;
 								}, {});
-								var until = formData.length ? (Date.now() + (formData.length * 1000 * 60 * 60 * (parseInt(formData.unit, 10) ? 24 : 1))) : 0;
+								var until = formData.length > 0 ? (Date.now() + (formData.length * 1000 * 60 * 60 * (parseInt(formData.unit, 10) ? 24 : 1))) : 0;
 								socket.emit('user.banUsers', { uids: uids, until: until, reason: formData.reason }, done('[[admin/manage/users:alerts.ban-success]]', '.ban', true));
 							},
 						},

public/src/client/account/header.js

@@ -132,7 +132,8 @@ define('forum/account/header', [
 								data[cur.name] = cur.value;
 								return data;
 							}, {});
-							var until = parseInt(formData.length, 10) ? (Date.now() + (formData.length * 1000 * 60 * 60 * (parseInt(formData.unit, 10) ? 24 : 1))) : 0;
+
+							var until = formData.length > 0 ? (Date.now() + (formData.length * 1000 * 60 * 60 * (parseInt(formData.unit, 10) ? 24 : 1))) : 0;
 
 							socket.emit('user.banUsers', {
 								uids: [ajaxify.data.theirid],