diff --git a/arch/sandbox/board/hostfile.c b/arch/sandbox/board/hostfile.c
index 38a52a8..e460d0a 100644
--- a/arch/sandbox/board/hostfile.c
+++ b/arch/sandbox/board/hostfile.c
@@ -109,6 +109,7 @@
 
 	strcpy(dev->name, "hostfile");
 	dev->size = hf->size;
+	dev->id = -1;
 	dev->map_base = hf->map_base;
 
 	return register_device(dev);