diff --git a/Jamfile b/Jamfile
index ec137c595b..ddfba6c651 100644
--- a/Jamfile
+++ b/Jamfile
@@ -1,6 +1,7 @@
 project-root ;
 
 # please order by name to ease maintenance
+subinclude libs/date_time/build ;
 subinclude libs/python/build ;
 subinclude libs/regex/build ;
 subinclude libs/signals/build ;