diff --git a/drivers/tty/serial/samsung_tty.c b/drivers/tty/serial/samsung_tty.c
index 73e2866febc1..2fb58c626daf 100644
--- a/drivers/tty/serial/samsung_tty.c
+++ b/drivers/tty/serial/samsung_tty.c
@@ -52,7 +52,7 @@
 #define S3C24XX_SERIAL_MINOR	64
 
 #ifdef CONFIG_ARM64
-#define UART_NR			12
+#define UART_NR			18
 #else
 #define UART_NR			CONFIG_SERIAL_SAMSUNG_UARTS
 #endif