--- a/qmlfrontend/engine_instance.cpp	Tue Feb 04 17:31:55 2025 +0100
+++ b/qmlfrontend/engine_instance.cpp	Mon Feb 17 16:37:59 2025 +0100
@@ -56,7 +56,7 @@
               advance_simulation && move_camera && simple_event && long_event &&
               positioned_event;
 
-  emit isValidChanged(m_isValid);
+  Q_EMIT isValidChanged(m_isValid);
 
   if (isValid()) {
     qDebug() << "Loaded engine library with protocol version"