diff --git a/src/soc/rockchip/rk3399/display.c b/src/soc/rockchip/rk3399/display.c
index b47fabc5e8..70e8c7c15d 100644
--- a/src/soc/rockchip/rk3399/display.c
+++ b/src/soc/rockchip/rk3399/display.c
@@ -7,7 +7,7 @@
 #include <delay.h>
 #include <edid.h>
 #include <gpio.h>
-#include <stddef.h>
+#include <stdint.h>
 #include <soc/addressmap.h>
 #include <soc/clock.h>
 #include <soc/display.h>