diff --git a/include/qemu/event_notifier.h b/include/qemu/event_notifier.h
index 88b57af7ce..a8f28540c9 100644
--- a/include/qemu/event_notifier.h
+++ b/include/qemu/event_notifier.h
@@ -38,7 +38,7 @@ int event_notifier_set_handler(EventNotifier *, EventNotifierHandler *);
 
 #ifdef CONFIG_POSIX
 void event_notifier_init_fd(EventNotifier *, int fd);
-int event_notifier_get_fd(EventNotifier *);
+int event_notifier_get_fd(const EventNotifier *);
 #else
 HANDLE event_notifier_get_handle(EventNotifier *);
 #endif
diff --git a/util/event_notifier-posix.c b/util/event_notifier-posix.c
index ed4ca2b01e..d4a0c63e12 100644
--- a/util/event_notifier-posix.c
+++ b/util/event_notifier-posix.c
@@ -77,7 +77,7 @@ void event_notifier_cleanup(EventNotifier *e)
     close(e->wfd);
 }
 
-int event_notifier_get_fd(EventNotifier *e)
+int event_notifier_get_fd(const EventNotifier *e)
 {
     return e->rfd;
 }