diff --git a/sbin/hammer/hammer.8 b/sbin/hammer/hammer.8
index 3ca6cd9..961b2f3 100644
--- a/sbin/hammer/hammer.8
+++ b/sbin/hammer/hammer.8
@@ -1294,6 +1294,9 @@ Also default snapshots directory has changed.
 .Dx 2.6
 default version.
 New undo/redo/flush, giving HAMMER a much faster sync and fsync.
+.It 5
+.Dx 2.9 .
+Offline deduplication support.
 .El
 .El
 .Sh PSEUDO-FILESYSTEM (PFS) NOTES