diff --git a/collects/srfi/48.ss b/collects/srfi/48.ss
index 88bfb8e447..20e3574753 100644
--- a/collects/srfi/48.ss
+++ b/collects/srfi/48.ss
@@ -1,2 +1,2 @@
 ;; module loader for SRFI-48
-#lang s-exp srfi/provider srfi/48/format
+#lang s-exp srfi/provider srfi/48/format #:unprefix s: