diff --git a/test/2-throw_exception_no_exceptions_test.cpp b/test/2-throw_exception_no_exceptions_test.cpp
index 02f0e96..5d70ca1 100644
--- a/test/2-throw_exception_no_exceptions_test.cpp
+++ b/test/2-throw_exception_no_exceptions_test.cpp
@@ -5,6 +5,7 @@
 
 #define BOOST_NO_EXCEPTIONS
 #include <boost/throw_exception.hpp>
+#include <stdlib.h>
 
 class my_exception: public std::exception { };
 
diff --git a/test/4-throw_exception_no_both_test.cpp b/test/4-throw_exception_no_both_test.cpp
index 421ad45..93708e8 100644
--- a/test/4-throw_exception_no_both_test.cpp
+++ b/test/4-throw_exception_no_both_test.cpp
@@ -6,6 +6,7 @@
 #define BOOST_NO_EXCEPTIONS
 #define BOOST_EXCEPTION_DISABLE
 #include <boost/throw_exception.hpp>
+#include <stdlib.h>
 
 class my_exception: public std::exception { };