diff --git a/man/bitstring.3bsd b/man/bitstring.3bsd
index 4708ce1..6006af0 100644
--- a/man/bitstring.3bsd
+++ b/man/bitstring.3bsd
@@ -44,6 +44,10 @@
 .Nm bitstr_size ,
 .Nm bit_test
 .Nd bit-string manipulation macros
+.Sh LIBRARY
+.ds str-Lb-libbsd Utility functions from BSD systems (libbsd, \-lbsd)
+.ds doc-str-Lb-libbsd \*[str-Lb-libbsd]
+.Lb libbsd
 .Sh SYNOPSIS
 .In bitstring.h
 (See
diff --git a/man/byteorder.3bsd b/man/byteorder.3bsd
index d79df43..5e5d6d3 100644
--- a/man/byteorder.3bsd
+++ b/man/byteorder.3bsd
@@ -31,6 +31,10 @@
 .Nm be16enc , be16dec , be32enc , be32dec , be64enc , be64dec ,
 .Nm le16enc , le16dec , le32enc , le32dec , le64enc , le64dec
 .Nd byte order operations
+.Sh LIBRARY
+.ds str-Lb-libbsd Utility functions from BSD systems (libbsd, \-lbsd)
+.ds doc-str-Lb-libbsd \*[str-Lb-libbsd]
+.Lb libbsd
 .Sh SYNOPSIS
 .In sys/endian.h
 (See
diff --git a/man/queue.3bsd b/man/queue.3bsd
index c11137f..8900f86 100644
--- a/man/queue.3bsd
+++ b/man/queue.3bsd
@@ -112,6 +112,10 @@
 .Nm TAILQ_SWAP
 .Nd implementations of singly-linked lists, singly-linked tail queues,
 lists and tail queues
+.Sh LIBRARY
+.ds str-Lb-libbsd Utility functions from BSD systems (libbsd, \-lbsd)
+.ds doc-str-Lb-libbsd \*[str-Lb-libbsd]
+.Lb libbsd
 .Sh SYNOPSIS
 .In sys/queue.h
 (See
diff --git a/man/tree.3bsd b/man/tree.3bsd
index 1293674..6800c74 100644
--- a/man/tree.3bsd
+++ b/man/tree.3bsd
@@ -75,6 +75,10 @@
 .Nm RB_INSERT ,
 .Nm RB_REMOVE
 .Nd implementations of splay and red-black trees
+.Sh LIBRARY
+.ds str-Lb-libbsd Utility functions from BSD systems (libbsd, \-lbsd)
+.ds doc-str-Lb-libbsd \*[str-Lb-libbsd]
+.Lb libbsd
 .Sh SYNOPSIS
 .In sys/tree.h
 (See