diff --git a/include/dt-bindings/clock/rk3399-cru.h b/include/dt-bindings/clock/rk3399-cru.h
index a5ff9f9263eb..852030f6dde0 100644
--- a/include/dt-bindings/clock/rk3399-cru.h
+++ b/include/dt-bindings/clock/rk3399-cru.h
@@ -133,6 +133,7 @@
 #define SCLK_PCIEPHY_REF100M		167
 #define SCLK_USBPHY0_480M_SRC		168
 #define SCLK_USBPHY1_480M_SRC		169
+#define SCLK_DDRCLK			170
 
 #define DCLK_VOP0			180
 #define DCLK_VOP1			181