diff --git a/host-common/include/host-common/window_agent.h b/host-common/include/host-common/window_agent.h
index 23a475c..a9489e0 100644
--- a/host-common/include/host-common/window_agent.h
+++ b/host-common/include/host-common/window_agent.h
@@ -127,6 +127,7 @@
     void (*show_virtual_scene_controls)(bool);
     void (*quit_request)(void);
     void (*getWindowPosition)(int*, int*);
+    bool (*hasWindow)();
 } QAndroidEmulatorWindowAgent;
 
 #ifndef USING_ANDROID_BP