diff --git a/guix/scripts/refresh.scm b/guix/scripts/refresh.scm
index e1ff544de0..805e4543ec 100644
--- a/guix/scripts/refresh.scm
+++ b/guix/scripts/refresh.scm
@@ -119,7 +119,7 @@ (define %options
                   (show-version-and-exit "guix refresh")))))
 
 (define (show-help)
-  (display (_ "Usage: guix refresh [OPTION]... PACKAGE...
+  (display (_ "Usage: guix refresh [OPTION]... [PACKAGE]...
 Update package definitions to match the latest upstream version.
 
 When PACKAGE... is given, update only the specified packages.  Otherwise