diff --git a/bin/cuirass.in b/bin/cuirass.in
index 799f64c..6f0cee5 100644
--- a/bin/cuirass.in
+++ b/bin/cuirass.in
@@ -143,7 +143,8 @@ if required."
         (show-version)
         (exit 0))
        ((null? specfile)
-        (display "You must provide a specification file as argument.~%")
+        (display "You must provide a specification file as argument.")
+        (newline)
         (exit 1))
        (else
         (let ((one-shot? (option-ref opts 'one-shot #f))