diff --git a/test/test_macros.hpp b/test/test_macros.hpp
index 76f57fd2..d8772965 100644
--- a/test/test_macros.hpp
+++ b/test/test_macros.hpp
@@ -12,7 +12,7 @@
 #include <typeinfo>
 #include <iostream>
 #include <iomanip>
-#include <cstdlib.h>
+#include <stdlib.h>
 
 #include <boost/core/lightweight_test.hpp>
 #include <boost/current_function.hpp>