diff --git a/drivers/clk/rockchip/clk-rk3399.c b/drivers/clk/rockchip/clk-rk3399.c
index ce1d2446f..38447441b 100644
--- a/drivers/clk/rockchip/clk-rk3399.c
+++ b/drivers/clk/rockchip/clk-rk3399.c
@@ -620,7 +620,7 @@ static struct rockchip_clk_branch rk3399_clk_branches[] __initdata = {
 	GATE(SCLK_I2S2_8CH, "clk_i2s2", "clk_i2s2_mux", CLK_SET_RATE_PARENT,
 			RK3399_CLKGATE_CON(8), 11, GFLAGS),
 
-	MUX(0, "clk_i2sout_src", mux_i2sch_p, CLK_SET_RATE_PARENT,
+	MUX(SCLK_I2SOUT_SRC, "clk_i2sout_src", mux_i2sch_p, CLK_SET_RATE_PARENT,
 			RK3399_CLKSEL_CON(31), 0, 2, MFLAGS),
 	COMPOSITE_NODIV(SCLK_I2S_8CH_OUT, "clk_i2sout", mux_i2sout_p, CLK_SET_RATE_PARENT,
 			RK3399_CLKSEL_CON(31), 2, 1, MFLAGS,
diff --git a/include/dt-bindings/clock/rk3399-cru.h b/include/dt-bindings/clock/rk3399-cru.h
index 44e0a319f..b7b07dfda 100644
--- a/include/dt-bindings/clock/rk3399-cru.h
+++ b/include/dt-bindings/clock/rk3399-cru.h
@@ -19,6 +19,7 @@
 #define ARMCLKB				9
 
 /* sclk gates (special clocks) */
+#define SCLK_I2SOUT_SRC			64
 #define SCLK_I2C1			65
 #define SCLK_I2C2			66
 #define SCLK_I2C3			67