diff --git a/build.jam b/build.jam
index 32378cd..f8149f6 100644
--- a/build.jam
+++ b/build.jam
@@ -7,8 +7,8 @@ import project ;
 
 project /boost/type_traits
     : common-requirements
-        <source>/boost/config//boost_config
-        <source>/boost/static_assert//boost_static_assert
+        <library>/boost/config//boost_config
+        <library>/boost/static_assert//boost_static_assert
         <include>include
     ;