diff --git a/src/middleware/header.js b/src/middleware/header.js
index be2e100044..9ccb085169 100644
--- a/src/middleware/header.js
+++ b/src/middleware/header.js
@@ -82,25 +82,10 @@ module.exports = function (middleware) {
 						privileges.global.get(req.uid, next);
 					},
 					user: function (next) {
-						var userData = {
-							uid: req.uid,
-							username: '[[global:guest]]',
-							userslug: '',
-							fullname: '[[global:guest]]',
-							email: '',
-							picture: user.getDefaultAvatar(),
-							status: 'offline',
-							reputation: 0,
-							'email:confirmed': 0,
-						};
-						if (req.loggedIn) {
-							user.getUserFields(req.uid, Object.keys(userData), next);
-						} else {
-							next(null, userData);
-						}
+						user.getUserData(req.uid, next);
 					},
 					isEmailConfirmSent: function (next) {
-						if (!meta.config.requireEmailConfirmation || !req.uid) {
+						if (!meta.config.requireEmailConfirmation || req.uid <= 0) {
 							return next(null, false);
 						}
 						db.get('uid:' + req.uid + ':confirm:email:sent', next);
diff --git a/src/user/data.js b/src/user/data.js
index ec3a51000f..22fb8e8df7 100644
--- a/src/user/data.js
+++ b/src/user/data.js
@@ -33,12 +33,26 @@ module.exports = function (User) {
 		'cover:position', 'groupTitle',
 	];
 
+	User.guestData = {
+		uid: 0,
+		username: '[[global:guest]]',
+		userslug: '',
+		fullname: '[[global:guest]]',
+		email: '',
+		'icon:text': '?',
+		'icon:bgColor': '#aaa',
+		groupTitle: '',
+		status: 'offline',
+		reputation: 0,
+		'email:confirmed': 0,
+	};
+
 	User.getUsersFields = function (uids, fields, callback) {
 		if (!Array.isArray(uids) || !uids.length) {
 			return setImmediate(callback, null, []);
 		}
 
-		uids = uids.map(uid => (isNaN(uid) ? 0 : uid));
+		uids = uids.map(uid => (isNaN(uid) ? 0 : parseInt(uid, 10)));
 
 		var fieldsToRemove = [];
 		function addField(field) {
@@ -60,7 +74,7 @@ module.exports = function (User) {
 			addField('lastonline');
 		}
 
-		var uniqueUids = _.uniq(uids);
+		var uniqueUids = _.uniq(uids).filter(uid => uid > 0);
 
 		async.waterfall([
 			function (next) {
@@ -114,12 +128,12 @@ module.exports = function (User) {
 	};
 
 	function uidsToUsers(uids, uniqueUids, usersData) {
-		var uidToUser = uniqueUids.reduce(function (memo, cur, idx) {
-			memo[cur] = usersData[idx];
+		var uidToUser = uniqueUids.reduce(function (memo, uid, idx) {
+			memo[uid] = usersData[idx];
 			return memo;
 		}, {});
 		var users = uids.map(function (uid) {
-			const returnPayload = uidToUser[uid];
+			const returnPayload = uidToUser[uid] || _.clone(User.guestData);
 			if (uid > 0 && !returnPayload.uid) {
 				returnPayload.oldUid = parseInt(uid, 10);
 			}
diff --git a/test/user.js b/test/user.js
index 387b038ba2..2137d6aec4 100644
--- a/test/user.js
+++ b/test/user.js
@@ -614,6 +614,16 @@ describe('User', function () {
 				done();
 			});
 		});
+
+		it('should load guest data', function (done) {
+			User.getUsersData([1, 0], function (err, data) {
+				assert.ifError(err);
+				assert.strictEqual(data[1].username, '[[global:guest]]');
+				assert.strictEqual(data[1].userslug, '');
+				assert.strictEqual(data[1].uid, 0);
+				done();
+			});
+		});
 	});
 
 	describe('not logged in', function () {