--- ./sandbox/linux/services/credentials.h.orig
+++ ./sandbox/linux/services/credentials.h
@@ -14,6 +14,8 @@
 #include <string>
 #include <vector>
 
+#include <sys/types.h>
+
 #include "sandbox/linux/system_headers/capability.h"
 #include "sandbox/sandbox_export.h"