diff --git a/tests/Jamfile b/tests/Jamfile
index e907792..c3ddf98 100644
--- a/tests/Jamfile
+++ b/tests/Jamfile
@@ -2,31 +2,31 @@ subproject libs/type_traits/tests ;
 
 
 unit-test alignment_test : alignment_test.cpp
-	: <include>$(BOOST_ROOT) : ;
+	: <sysinclude>$(BOOST_ROOT) : ;
 
 unit-test arithmetic_traits_test : arithmetic_traits_test.cpp
-	: <include>$(BOOST_ROOT) : ;
+	: <sysinclude>$(BOOST_ROOT) : ;
 
 unit-test composite_traits_test : composite_traits_test.cpp
-	: <include>$(BOOST_ROOT) : ;
+	: <sysinclude>$(BOOST_ROOT) : ;
 
 unit-test cv_traits_test : cv_traits_test.cpp
-	: <include>$(BOOST_ROOT) : ;
+	: <sysinclude>$(BOOST_ROOT) : ;
 
 unit-test is_convertible_test : is_convertible_test.cpp
-	: <include>$(BOOST_ROOT) : ;
+	: <sysinclude>$(BOOST_ROOT) : ;
 
 unit-test is_function_test : is_function_test.cpp
-	: <include>$(BOOST_ROOT) : ;
+	: <sysinclude>$(BOOST_ROOT) : ;
 
 unit-test is_same_test : is_same_test.cpp
-	: <include>$(BOOST_ROOT) : ;
+	: <sysinclude>$(BOOST_ROOT) : ;
 
 unit-test object_type_traits_test : object_type_traits_test.cpp
-	: <include>$(BOOST_ROOT) : ;
+	: <sysinclude>$(BOOST_ROOT) : ;
 
 unit-test transform_traits_test : transform_traits_test.cpp
-	: <include>$(BOOST_ROOT) : ;
+	: <sysinclude>$(BOOST_ROOT) : ;