diff --git a/arch/arm64/configs/rk1808_linux_defconfig b/arch/arm64/configs/rk1808_linux_defconfig
index 789f4852baf0..84d08b0631f5 100644
--- a/arch/arm64/configs/rk1808_linux_defconfig
+++ b/arch/arm64/configs/rk1808_linux_defconfig
@@ -186,8 +186,8 @@ CONFIG_SERIAL_8250=y
 # CONFIG_SERIAL_8250_DEPRECATED_OPTIONS is not set
 CONFIG_SERIAL_8250_CONSOLE=y
 # CONFIG_SERIAL_8250_PCI is not set
-CONFIG_SERIAL_8250_NR_UARTS=5
-CONFIG_SERIAL_8250_RUNTIME_UARTS=5
+CONFIG_SERIAL_8250_NR_UARTS=8
+CONFIG_SERIAL_8250_RUNTIME_UARTS=8
 CONFIG_SERIAL_8250_DW=y
 CONFIG_HW_RANDOM=y
 CONFIG_HW_RANDOM_ROCKCHIP=y