diff --git a/man/duff.1 b/man/duff.1
index 0e20301..c790140 100644
--- a/man/duff.1
+++ b/man/duff.1
@@ -153,8 +153,8 @@ compares files byte by byte when their sizes match.
 .It Fl v
 Display version information and exit.
 .It Fl z
-Do not consider files with zero size to be equal.
-This option suppresses reporting a cluster of empty files.
+Do not consider empty files to be equal.
+This option prevents empty files from being reported as duplicates.
 .El
 .Sh EXAMPLES
 .\" TODO: Fix the formatting of the example commands.