diff --git a/gnu/usr.bin/groff/tmac/doc-common b/gnu/usr.bin/groff/tmac/doc-common
index 3c1aca4c7b19..f3ba84fe3594 100644
--- a/gnu/usr.bin/groff/tmac/doc-common
+++ b/gnu/usr.bin/groff/tmac/doc-common
@@ -227,6 +227,7 @@
 .	if "\\$2"2.0"    .ds oS FreeBSD 2.0
 .	if "\\$2"2.0.5"  .ds oS FreeBSD 2.0.5
 .	if "\\$2"2.1"    .ds oS FreeBSD 2.1
+.	if "\\$2"2.1.5"  .ds oS FreeBSD 2.1.5
 .	if "\\$2"2.2"    .ds oS FreeBSD 2.2
 .\}
 .if "\\*(oS"Null" .ds oS \0\\$1
diff --git a/gnu/usr.bin/groff/tmac/doc-syms b/gnu/usr.bin/groff/tmac/doc-syms
index 8031ae407f97..727ae23279ca 100644
--- a/gnu/usr.bin/groff/tmac/doc-syms
+++ b/gnu/usr.bin/groff/tmac/doc-syms
@@ -152,12 +152,14 @@
 .	if "\\$1"2.0"  \&\\*(tNFreeBSD\\*(aa 2.0\\*(aa\\$2
 .	if "\\$1"2.0.5"  \&\\*(tNFreeBSD\\*(aa 2.0.5\\*(aa\\$2
 .	if "\\$1"2.1"  \&\\*(tNFreeBSD\\*(aa 2.1\\*(aa\\$2
+.	if "\\$1"2.1.5"  \&\\*(tNFreeBSD\\*(aa 2.1.5\\*(aa\\$2
 .	if "\\$1"2.2"  \&\\*(tNFreeBSD\\*(aa 2.2\\*(aa\\$2
 .\}
 .if \\n(.$==1 \{\
 .	if "\\$1"2.0"  \&\\*(tNFreeBSD\\*(aa 2.0\\*(aa
 .	if "\\$1"2.0.5"  \&\\*(tNFreeBSD\\*(aa 2.0.5\\*(aa
 .	if "\\$1"2.1"  \&\\*(tNFreeBSD\\*(aa 2.1\\*(aa
+.	if "\\$1"2.1.5"  \&\\*(tNFreeBSD\\*(aa 2.1.5\\*(aa
 .	if "\\$1"2.2"  \&\\*(tNFreeBSD\\*(aa 2.2\\*(aa
 .\}
 ..