diff --git a/drivers/usb/gadget/u_serial.c b/drivers/usb/gadget/u_serial.c
index 6597a68..a553bee 100644
--- a/drivers/usb/gadget/u_serial.c
+++ b/drivers/usb/gadget/u_serial.c
@@ -920,7 +920,7 @@
 	unsigned long	flags;
 	int		status;
 
-	pr_vdebug("gs_put_char: (%d,%p) char=0x%x, called from %p\n",
+	pr_vdebug("gs_put_char: (%d,%p) char=0x%x, called from %pf\n",
 		port->port_num, tty, ch, __builtin_return_address(0));
 
 	spin_lock_irqsave(&port->port_lock, flags);