diff --git a/lib/libmp/libmp.3 b/lib/libmp/libmp.3
index e99f36e11aeb..9be21d7b0de4 100644
--- a/lib/libmp/libmp.3
+++ b/lib/libmp/libmp.3
@@ -278,6 +278,7 @@ on standard error and a call to
 .Xr abort 3 .
 .Sh SEE ALSO
 .Xr abort 3 ,
+.Xr bn 3 ,
 .Xr crypto 3 ,
 .Xr free 3 ,
 .Xr malloc 3 ,