diff --git a/src/socket.js.c b/src/socket.js.c
index ad517882..f0cec254 100644
--- a/src/socket.js.c
+++ b/src/socket.js.c
@@ -80,12 +80,24 @@ static void _socket_processOutgoingTls(socket_t* socket);
 static void _socket_reportTlsErrors(socket_t* socket);
 static void _socket_reportError(socket_t* socket, const char* error);
 
+static void _socket_gc_mark(JSRuntime* runtime, JSValueConst value, JS_MarkFunc mark_func)
+{
+	socket_t* socket = JS_GetOpaque(value, _classId);
+	if (socket)
+	{
+		JS_MarkValue(runtime, socket->_onConnect, mark_func);
+		JS_MarkValue(runtime, socket->_onRead, mark_func);
+		JS_MarkValue(runtime, socket->_onError, mark_func);
+	}
+}
+
 JSValue tf_socket_register(JSContext* context)
 {
 	JS_NewClassID(&_classId);
 	JSClassDef def = {
 		.class_name = "Socket",
 		.finalizer = &_socket_finalizer,
+		.gc_mark = _socket_gc_mark,
 	};
 	if (JS_NewClass(JS_GetRuntime(context), _classId, &def) != 0)
 	{