diff --git a/contrib/groff/tmac/doc-common b/contrib/groff/tmac/doc-common
index 6bb7a18e1b9d..958a4f06e32e 100644
--- a/contrib/groff/tmac/doc-common
+++ b/contrib/groff/tmac/doc-common
@@ -419,7 +419,6 @@
 .ds doc-operating-system-FreeBSD-4.3     4.3
 .ds doc-operating-system-FreeBSD-4.4     4.4
 .ds doc-operating-system-FreeBSD-4.5     4.5
-.ds doc-operating-system-FreeBSD-4.6     4.6
 .ds doc-operating-system-FreeBSD-5.0     5.0
 .
 .de Os
diff --git a/gnu/usr.bin/groff/tmac/mdoc.local b/gnu/usr.bin/groff/tmac/mdoc.local
index 0472637f64aa..75c6662ce55c 100644
--- a/gnu/usr.bin/groff/tmac/mdoc.local
+++ b/gnu/usr.bin/groff/tmac/mdoc.local
@@ -54,7 +54,8 @@
 .ds doc-operating-system FreeBSD\~5.0
 .
 .\" FreeBSD releases not found in doc-common
-.ds doc-operating-system-FreeBSD-4.6.1    4.6.1
+.ds doc-operating-system-FreeBSD-4.6    4.6
+.ds doc-operating-system-FreeBSD-4.6.1  4.6.1
 .ds doc-operating-system-FreeBSD-4.7    4.7
 .ds doc-operating-system-FreeBSD-4.8    4.8
 .