diff --git a/[refs] b/[refs]
index 87b631eaf51f..12106f1a2ff7 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 9c0f4755bd5a117595761c95b93c29e8d9ca07b5
+refs/heads/master: 9a8ffccf3d282ee749210232465f61e1c48b7a86
diff --git a/trunk/drivers/serial/Kconfig b/trunk/drivers/serial/Kconfig
index 0d38f0f2ae29..42d1de155292 100644
--- a/trunk/drivers/serial/Kconfig
+++ b/trunk/drivers/serial/Kconfig
@@ -98,6 +98,7 @@ config SERIAL_8250_NR_UARTS
 config SERIAL_8250_RUNTIME_UARTS
 	int "Number of 8250/16550 serial ports to register at runtime"
 	depends on SERIAL_8250
+	range 0 SERIAL_8250_NR_UARTS
 	default "4"
 	help
 	  Set this to the maximum number of serial ports you want