diff --git a/scheme/more-packages.scm b/scheme/more-packages.scm
index bcf1dc8..edc547b 100644
--- a/scheme/more-packages.scm
+++ b/scheme/more-packages.scm
@@ -728,7 +728,7 @@
   (begin
     (define available-srfis
       '(srfi-1 srfi-2 srfi-5 srfi-6 srfi-7 srfi-8 srfi-9
-	srfi-11 srfi-13 srfi-14 srfi-16 srfi-17 srfi-23
+	srfi-11 srfi-13 srfi-14 srfi-16 srfi-17 srfi-19 srfi-23
 	srfi-25 srfi-26 srfi-27 srfi-28 srfi-30 srfi-31
 	srfi-37))