diff --git a/tools/system_messages.cc b/tools/system_messages.cc
index f12dc5ad9e..d3cc2303b3 100644
--- a/tools/system_messages.cc
+++ b/tools/system_messages.cc
@@ -34,7 +34,7 @@
 #include <vector>
 
 #include <stdlib.h>
-#include <string.h>
+#include <cstring>
 
 #include <boost/lexical_cast.hpp>