diff --git a/docs/markdown/Reference-tables.md b/docs/markdown/Reference-tables.md
index 676a8ca18..260ae3049 100644
--- a/docs/markdown/Reference-tables.md
+++ b/docs/markdown/Reference-tables.md
@@ -97,6 +97,7 @@ These are provided by the `.system()` method call.
 | haiku               | |
 | linux               | |
 | netbsd              | |
+| openbsd             | |
 | windows             | Any version of Windows |
 | sunos               | illumos and Solaris |