diff --git a/lib/Makefile.am b/lib/Makefile.am
index 21d807a..636f42c 100644
--- a/lib/Makefile.am
+++ b/lib/Makefile.am
@@ -93,6 +93,10 @@
 SUBDIRS += lua
 endif
 
+if WITH_RS
+SUBDIRS += rs
+endif
+
 # All of the libs that don't use Automake need to go in here
 # so they will end up in our release tarballs.
 EXTRA_DIST = \