diff --git a/share/misc/bsd-family-tree b/share/misc/bsd-family-tree
index 43ab9d643f74..eba25d03fe3d 100644
--- a/share/misc/bsd-family-tree
+++ b/share/misc/bsd-family-tree
@@ -253,7 +253,7 @@ FreeBSD 5.2           |      |                 |                       |
  *--FreeBSD    |      |      |                 |                       |
  |    9.0      |      |      |                 |               DragonFly 3.0.1
  |     v    FreeBSD   |      |                 |                       |
- |            8.3     |      |                 |                       |
+ |            8.3     |      |             OpenBSD 5.1                 |
  |                    |      |                 |                       |
 FreeBSD 10 -current   |  NetBSD -current  OpenBSD -current             |
  |                    |      |                 |                       |
@@ -546,6 +546,7 @@ OpenBSD 5.0		2011-11-01 [OBD]
 FreeBSD 9.0		2012-01-12 [FBD]
 DragonFly 3.0.1		2012-02-21 [DFB]
 FreeBSD 8.3		2012-04-18 [FBD]
+OpenBSD 5.1		2012-05-01 [OBD]
 
 Bibliography
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