diff --git a/drivers/tty/hvc/hvc_iucv.c b/drivers/tty/hvc/hvc_iucv.c
index 7d49a872de48..9551269e106a 100644
--- a/drivers/tty/hvc/hvc_iucv.c
+++ b/drivers/tty/hvc/hvc_iucv.c
@@ -130,7 +130,7 @@ static struct iucv_handler hvc_iucv_handler = {
  */
 static struct hvc_iucv_private *hvc_iucv_get_private(uint32_t num)
 {
-	if (num > hvc_iucv_devices)
+	if (num >= hvc_iucv_devices)
 		return NULL;
 	return hvc_iucv_table[num];
 }