diff --git a/cxx/cxxtest.cpp b/cxx/cxxtest.cpp
index 3262fcf..2f283fe 100644
--- a/cxx/cxxtest.cpp
+++ b/cxx/cxxtest.cpp
@@ -13,6 +13,7 @@
  */
 
 #include <iostream>
+#include <cstring>
 
 #include <cucul++.h>
 #include <caca++.h>