diff --git a/include/dt-bindings/clock/rk3568-cru.h b/include/dt-bindings/clock/rk3568-cru.h
index 566a04384892..22b0b8739b5d 100644
--- a/include/dt-bindings/clock/rk3568-cru.h
+++ b/include/dt-bindings/clock/rk3568-cru.h
@@ -478,6 +478,7 @@
 #define CPLL_50M		415
 #define CPLL_25M		416
 #define CPLL_100M		417
+#define SCLK_DDRCLK		418
 
 #define PCLK_CORE_PVTM		450