diff --git a/CLASH.system b/CLASH.system
index 8daf5d4..d8d4856 100644
--- a/CLASH.system
+++ b/CLASH.system
@@ -24,6 +24,7 @@
     ((:module "base"
 	      :source-pathname ""
 	      :components ((:file "package")
+			   (:file "md5" :source-extension "lisp")
 			   (:file "utility" :depends-on ("package"))
 			   #+cmu
 			   (:file "cmu-locking" :depends-on ("package"))