diff --git a/share/man/man7/release.7 b/share/man/man7/release.7
index d09c86b7ea08..e95ad1e3c87f 100644
--- a/share/man/man7/release.7
+++ b/share/man/man7/release.7
@@ -220,6 +220,10 @@ or
 will ask
 .Xr cvs 1
 to check out or update sources as of 00:00:00 GMT, January 1 2002, respectively.
+.It Va DOC_LANG
+The list of languages and encodings the SGML-based documentation
+should be built for.
+If not set, the documentation is built for all available languages.
 .It Va DOCRELEASETAG
 The CVS tag to use when checking out the documentation tree.
 Usually,