diff --git a/lib/chibi/config.sld b/lib/chibi/config.sld
index 89d44c7a..08bf1243 100644
--- a/lib/chibi/config.sld
+++ b/lib/chibi/config.sld
@@ -3,7 +3,7 @@
   (export make-conf conf? conf-load conf-load-in-path conf-load-cascaded
           conf-verify conf-extend conf-append conf-set conf-unfold-key
           conf-get conf-get-list conf-get-multi
-          conf-specialize read-from-file)
+          conf-specialize read-from-file conf-source)
   (import (scheme base) (scheme read) (scheme write) (scheme file)
           (scheme time) (srfi 1))
   ;; This is only used for config verification, it's acceptable to