diff --git a/gnu/usr.bin/groff/tmac/mdoc.local b/gnu/usr.bin/groff/tmac/mdoc.local
index 28de2afb3fe..0618ca21031 100644
--- a/gnu/usr.bin/groff/tmac/mdoc.local
+++ b/gnu/usr.bin/groff/tmac/mdoc.local
@@ -76,6 +76,7 @@
 .\" FreeBSD releases not found in doc-common
 .ds doc-operating-system-FreeBSD-7.2    7.2
 .ds doc-operating-system-FreeBSD-7.3    7.3
+.ds doc-operating-system-FreeBSD-7.4    7.4
 .ds doc-operating-system-FreeBSD-8.0    8.0
 .ds doc-operating-system-FreeBSD-8.1    8.1
 .ds doc-operating-system-FreeBSD-9.0    9.0