diff --git a/include/hw/misc/unimp.h b/include/hw/misc/unimp.h
index 3462d85836..52e068ec3e 100644
--- a/include/hw/misc/unimp.h
+++ b/include/hw/misc/unimp.h
@@ -8,6 +8,8 @@
 #ifndef HW_MISC_UNIMP_H
 #define HW_MISC_UNIMP_H
 
+#include "hw/sysbus.h"
+
 #define TYPE_UNIMPLEMENTED_DEVICE "unimplemented-device"
 
 /**