diff --git a/cassh.1 b/cassh.1
index d6220ab..d316ed7 100644
--- a/cassh.1
+++ b/cassh.1
@@ -90,7 +90,9 @@ or the string
 .Sq cassh
 if there is no comment reported.
 .It %f
-The basename of the public key being signed.
+The basename of the public key being signed, without
+.Sq .pub
+suffix.
 .El
 .Pp
 .Ar key_id
@@ -122,7 +124,7 @@ Write a
 file on standard output corresponding to the current Certification
 Authority.
 .Ar hostnames
-are concatenated with commans and copied verbatim to the output.
+are concatenated with commas and copied verbatim to the output.
 See
 .Xr sshd 8 SSH_KNOWN_HOSTS FILE FORMAT
 for details.