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diff --git a/man/hugectl.8 b/man/hugectl.8
index 319742e..6ee70f2 100644
--- a/man/hugectl.8
+++ b/man/hugectl.8
@@ -63,6 +63,11 @@ Request that multiple application instances share text segments that are
backed with huge pages. This option sets the environment variable
HUGETLB_SHARE to 1.
+.TP
+.B --thp
+Align heap regions to huge page size for promotion by khugepaged. For more
+information on transparent huge pages see linux-2.6/Documentation/transhuge.txt
+
.PP
The following options affect how \fBhugectl\fP behaves.