diff --git a/drivers/serial/serial_core.c b/drivers/serial/serial_core.c
index 401d94a..0745ce78 100644
--- a/drivers/serial/serial_core.c
+++ b/drivers/serial/serial_core.c
@@ -1967,7 +1967,9 @@
 		break;
 	}
 
-	printk(KERN_INFO "%s%d at %s (irq = %d) is a %s\n",
+	printk(KERN_INFO "%s%s%s%d at %s (irq = %d) is a %s\n",
+	       port->dev ? port->dev->bus_id : "",
+	       port->dev ? ": " : "",
 	       drv->dev_name, port->line, address, port->irq, uart_type(port));
 }