--- nono/vm/fdc.h	2026/04/29 17:05:30	1.1.1.11
+++ nono/vm/fdc.h	2026/04/29 17:05:34	1.1.1.12
@@ -13,7 +13,6 @@
 #include "device.h"
 #include "event.h"
 #include "fixedqueue.h"
-#include "monitor.h"
 #include <array>
 
 class DMACDevice;
@@ -454,7 +453,7 @@ class FDCDevice : public IODevice
 	Event poll_event { this };	// ポーリング用
 	Event motor_event { this };	// モータ停止用
 
-	Monitor monitor { this };
+	Monitor *monitor {};
 };
 
 static inline FDCDevice *GetFDCDevice() {