diff --git a/guix/gnu-maintenance.scm b/guix/gnu-maintenance.scm
index 4c7241fc88befc7cc8a233a7720913281ba82319..be739e34a30d2bc4b39ed19a46b04c701a565149 100644
--- a/guix/gnu-maintenance.scm
+++ b/guix/gnu-maintenance.scm
@@ -356,9 +356,9 @@ (define* (download-tarball store project directory version
       (if ret
           tarball
           (begin
-            (warning (_ "signature verification failed for `~a'")
+            (warning (_ "signature verification failed for `~a'~%")
                      base)
-            (warning (_ "(could be because the public key is not in your keyring)"))
+            (warning (_ "(could be because the public key is not in your keyring)~%"))
             #f)))))
 
 (define (package-update store package)