diff --git a/doc/guix.texi b/doc/guix.texi
index ddbb6c8939b50cb8338dfa794523a5fb6efac953..b20848da5e0046f257146411447a8246fe9a4343 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -2197,7 +2197,7 @@ make sure you checked the GPG signature of
 Then, you can run something like this:
 
 @example
-# guix archive --authorize < hydra.gnu.org.pub
+# guix archive --authorize < @var{prefix}/share/guix/hydra.gnu.org.pub
 @end example
 
 Once this is in place, the output of a command like @code{guix build}