Improve man pages.
diff --git a/man/zip_source_stat.mdoc b/man/zip_source_stat.mdoc
index 08143b8..cb68b73 100644
--- a/man/zip_source_stat.mdoc
+++ b/man/zip_source_stat.mdoc
@@ -40,12 +40,12 @@
.Sh SYNOPSIS
.In zip.h
.Ft int
-.Fn zip_source_stat "zip_source_t *zs" "zip_stat_t *sb"
+.Fn zip_source_stat "zip_source_t *source" "zip_stat_t *sb"
.Sh DESCRIPTION
The
.Fn zip_source_stat
function obtains information about the zip source
-.Ar zs
+.Ar source
.Pp
The
.Ar sb
@@ -68,7 +68,9 @@
.Ed
The structure pointed to by
.Ar sb
-must be allocated before calling
+must be initialized with
+.Fn zip_stat_init 3
+before calling
.Fn zip_source_stat .
.Pp
The
@@ -108,7 +110,7 @@
.Sh RETURN VALUES
Upon successful completion 0 is returned.
Otherwise, \-1 is returned and the error information in
-.Ar zs
+.Ar source
is set to indicate the error.
.Sh SEE ALSO
.Xr libzip 3 ,
