diff --git a/src/socket.io/index.js b/src/socket.io/index.js
index 858223f07d..50ae9b25f6 100644
--- a/src/socket.io/index.js
+++ b/src/socket.io/index.js
@@ -97,6 +97,10 @@ function onConnection(socket) {
 	socket.on('disconnect', () => {
 		onDisconnect(socket);
 	});
+
+	socket.on('disconnecting', () => {
+		onDisconnecting(socket);
+	});
 }
 
 function onDisconnect(socket) {
@@ -104,6 +108,19 @@ function onDisconnect(socket) {
 	plugins.hooks.fire('action:sockets.disconnect', { socket: socket });
 }
 
+async function onDisconnecting(socket) {
+	if (socket.uid > 0) {
+		for (const roomName of socket.rooms) {
+			if (roomName.startsWith('chat_room') && !roomName.includes('public')) {
+				Sockets.server.in(roomName).emit('event:chats.user-online', {
+					uid: socket.uid,
+					state: 0,
+				});
+			}
+		}
+	}
+}
+
 async function onConnect(socket) {
 	try {
 		await validateSession(socket, '[[error:invalid-session]]');