diff --git a/patch/kernel/rockchip64-dev/add-board-rockpi4b.patch b/patch/kernel/rockchip64-dev/add-board-rockpi4b.patch
index 7927b859f..34141b6ac 100644
--- a/patch/kernel/rockchip64-dev/add-board-rockpi4b.patch
+++ b/patch/kernel/rockchip64-dev/add-board-rockpi4b.patch
@@ -747,7 +747,7 @@ index 0000000..52f4731
 +	cd-gpios = <&gpio0 7 GPIO_ACTIVE_LOW>;
 +	disable-wp;
 +	sd-uhs-sdr104;
-+	max-frequency = <150000000>;
++	max-frequency = <10000000>;
 +	vqmmc-supply = <&vcc_sdio>;
 +	pinctrl-names = "default";
 +	pinctrl-0 = <&sdmmc_clk &sdmmc_cmd &sdmmc_bus4>;