diff -ru a/boost_1_54_0/tools/build/v2/build/project.jam b/boost_1_54_0/tools/build/v2/build/project.jam
--- a/boost_1_54_0/tools/build/v2/build/project.jam	2013-10-30 10:58:50.540423200 -0700
+++ b/boost_1_54_0/tools/build/v2/build/project.jam	2013-10-30 10:59:11.807639600 -0700
@@ -890,7 +890,7 @@
     if ! $(.target.$(project-module))
     {
         import errors ;
-        errors.user-error Project target requested but not yet assigned for
+        errors.error Project target requested but not yet assigned for
             module '$(project-module)'. ;
     }
     return $(.target.$(project-module)) ;