diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
index da9fde8..6b20fd6 100644
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c
@@ -2906,9 +2906,9 @@
 
 EXPORT_SYMBOL(do_SAK);
 
-static int dev_match_devt(struct device *dev, void *data)
+static int dev_match_devt(struct device *dev, const void *data)
 {
-	dev_t *devt = data;
+	const dev_t *devt = data;
 	return dev->devt == *devt;
 }