diff --git a/sandbox/linux/services/credentials.cc b/sandbox/linux/services/credentials.cc
index c933eafd1..c0368e92b 100644
--- a/sandbox/linux/services/credentials.cc
+++ b/sandbox/linux/services/credentials.cc
@@ -11,6 +11,7 @@
 #include <stddef.h>
 #include <stdint.h>
 #include <stdio.h>
+#include <string.h>
 #include <sys/syscall.h>
 #include <sys/types.h>
 #include <sys/wait.h>