diff --git a/include/dt-bindings/clock/rk3368-cru.h b/include/dt-bindings/clock/rk3368-cru.h
index 742d12ecc505..24ba64ec9866 100644
--- a/include/dt-bindings/clock/rk3368-cru.h
+++ b/include/dt-bindings/clock/rk3368-cru.h
@@ -91,6 +91,7 @@
 #define SCLK_TIMER13		136
 #define SCLK_TIMER14		137
 #define SCLK_TIMER15		138
+#define SCLK_DDRCLK		139
 
 #define DCLK_VOP		190
 #define MCLK_CRYPTO		191