diff --git a/test/test_serialization3.cpp b/test/test_serialization3.cpp
index 3c07757..bd05802 100644
--- a/test/test_serialization3.cpp
+++ b/test/test_serialization3.cpp
@@ -69,7 +69,7 @@ namespace boost{
 namespace serialization{
 template<> struct version<non_default_ctble>
 {
-  BOOST_STATIC_CONSTANT(unsigned int,value=3);
+  BOOST_STATIC_CONSTANT(int,value=3);
 };
 } /* namespace serialization */
 } /* namespace boost*/