diff --git a/net/bluetooth/iso.c b/net/bluetooth/iso.c
index 876649556d3c..3d707c43bdc0 100644
--- a/net/bluetooth/iso.c
+++ b/net/bluetooth/iso.c
@@ -1595,6 +1595,7 @@ static void iso_conn_big_sync(struct sock *sk)
 
 	release_sock(sk);
 	hci_dev_unlock(hdev);
+	hci_dev_put(hdev);
 }
 
 static int iso_sock_recvmsg(struct socket *sock, struct msghdr *msg,