diff --git a/arch/arm/dts/rk3399-rock-pi-4-u-boot.dtsi b/arch/arm/dts/rk3399-rock-pi-4-u-boot.dtsi
index 7bddc3acdb..dbfa4ba9f8 100644
--- a/arch/arm/dts/rk3399-rock-pi-4-u-boot.dtsi
+++ b/arch/arm/dts/rk3399-rock-pi-4-u-boot.dtsi
@@ -4,3 +4,4 @@
  */
 
 #include "rk3399-u-boot.dtsi"
+#include "rk3399-sdram-lpddr4-100.dtsi"