diff --git a/scheme/packages.scm b/scheme/packages.scm
index 2f21e3b..da81283 100644
--- a/scheme/packages.scm
+++ b/scheme/packages.scm
@@ -412,7 +412,7 @@
 (define-structure sunet-version (export sunet-version-identifier)
   (open scheme)
   (begin
-    (define sunet-version-identifier 2.0)))
+    (define sunet-version-identifier "2.0")))
 
 ;; Net protocols and formats