diff --git a/src/vendorcode/google/chromeos/chromeos.h b/src/vendorcode/google/chromeos/chromeos.h
index ae715dc153..f51215e12e 100644
--- a/src/vendorcode/google/chromeos/chromeos.h
+++ b/src/vendorcode/google/chromeos/chromeos.h
@@ -20,6 +20,7 @@
 #ifndef __CHROMEOS_H__
 #define __CHROMEOS_H__
 
+#include <stddef.h>
 #include <stdint.h>
 
 /* functions implemented per mainboard: */