--- file_not_specified_in_diff	
+++ file_not_specified_in_diff	
@@ -, +, @@ 
--- src/sdw.hxx
+++ src/sdw.hxx
@@ -19,6 +19,7 @@ 
 
 #include <iostream>
 #include <string>
+#include <cstdlib>
 
 namespace SDLWrapper                            // It's all nicely in a namespace SDLWrapper
 {