diff --git a/net/9p/client.c b/net/9p/client.c
index e265a0ca6bdd..a9d613af7455 100644
--- a/net/9p/client.c
+++ b/net/9p/client.c
@@ -235,6 +235,8 @@ static int p9_fcall_init(struct p9_client *c, struct p9_fcall *fc,
 	if (!fc->sdata)
 		return -ENOMEM;
 	fc->capacity = alloc_msize;
+	fc->id = 0;
+	fc->tag = 0;
 	return 0;
 }