diff --git a/[refs] b/[refs]
index f92a38bf0132..45165c9ce194 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: d7f549fa14ed7e3d72927e89dec721eeff4a0159
+refs/heads/master: c3667d5c321ac2211d04a746f91a48d339a0e0a1
diff --git a/trunk/drivers/char/mxser_new.c b/trunk/drivers/char/mxser_new.c
index 0b25457cda05..d2dcc546cc75 100644
--- a/trunk/drivers/char/mxser_new.c
+++ b/trunk/drivers/char/mxser_new.c
@@ -2153,7 +2153,7 @@ static void mxser_transmit_chars(struct mxser_port *port)
 		return;
 	}
 
-	if (port->xmit_buf == 0)
+	if (port->xmit_buf == NULL)
 		return;
 
 	if ((port->xmit_cnt <= 0) || port->tty->stopped ||