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diff --git a/docs/busybox.sgml b/docs/busybox.sgml
index 1848141..7d86e19 100644
--- a/docs/busybox.sgml
+++ b/docs/busybox.sgml
@@ -3428,6 +3428,18 @@
</para>
<para>
+ Options:
+ </para>
+
+ <para>
+ <screen>
+ -c prefix lines by the number of occurrences
+ -d only print duplicate lines
+ -u only print unique lines
+ </screen>
+ </para>
+
+ <para>
Example:
</para>