diff --git a/src/soc/rockchip/common/i2c.c b/src/soc/rockchip/common/i2c.c
index 393b45753d..dbbfd3e041 100644
--- a/src/soc/rockchip/common/i2c.c
+++ b/src/soc/rockchip/common/i2c.c
@@ -10,6 +10,8 @@
 #include <soc/soc.h>
 #include <soc/i2c.h>
 #include <soc/clock.h>
+#include <stddef.h>
+#include <stdint.h>
 
 #define RETRY_COUNT	3
 /* 100000us = 100ms */
diff --git a/src/soc/rockchip/rk3399/spi_bitbang.c b/src/soc/rockchip/rk3399/spi_bitbang.c
index 6bb854d2f4..27b23f1ea3 100644
--- a/src/soc/rockchip/rk3399/spi_bitbang.c
+++ b/src/soc/rockchip/rk3399/spi_bitbang.c
@@ -8,6 +8,7 @@
 #include <soc/spi.h>
 #include <spi_bitbang.h>
 #include <spi_flash.h>
+#include <stddef.h>
 
 struct rockchip_bitbang_slave {
 	struct spi_bitbang_ops ops;