diff --git a/gnu/usr.bin/groff/tmac/mdoc.local b/gnu/usr.bin/groff/tmac/mdoc.local
index bb26a1ba20b9..befc87d3f6a6 100644
--- a/gnu/usr.bin/groff/tmac/mdoc.local
+++ b/gnu/usr.bin/groff/tmac/mdoc.local
@@ -74,6 +74,7 @@
 .
 .\" FreeBSD releases not found in doc-common
 .ds doc-operating-system-FreeBSD-7.4    7.4
+.ds doc-operating-system-FreeBSD-8.3    8.3
 .ds doc-operating-system-FreeBSD-9.0    9.0
 .
 .\" Definitions not (yet) in doc-syms