diff --git a/lang/go/src/fetch.sld b/lang/go/src/fetch.sld
index 607befc..bafd49b 100644
--- a/lang/go/src/fetch.sld
+++ b/lang/go/src/fetch.sld
@@ -17,7 +17,7 @@
       (define hash (if cache-entry
                      (cdr cache-entry)
                      (begin (fprintf (current-error-port) "(pre)fetching ~S ~S\n" name url)
-                      (nix-prefetch-url name url #f))))
+                      (nix-prefetch-url name url))))
       (unless cache-entry
         (set! fetch-cache (cons (cons url hash) fetch-cache))
         (call-with-output-file fetch-cache-file (lambda (out) (write fetch-cache out))))