diff --git a/sys/dev/disk/fd/fd.c b/sys/dev/disk/fd/fd.c
--- a/sys/dev/disk/fd/fd.c
+++ b/sys/dev/disk/fd/fd.c
@@ -1087,8 +1087,8 @@
 	disk_invalidate(&fd->disk);
 	disk_destroy(&fd->disk);
 	devstat_remove_entry(&fd->device_stats);
-	callout_stop(&fd->toffhandle);
-	callout_stop(&fd->motor);
+	callout_stop_sync(&fd->toffhandle);
+	callout_stop_sync(&fd->motor);
 
 	return (0);
 }