diff --git a/lib/Makefile b/lib/Makefile
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -90,6 +90,7 @@
 	librss \
 	librt \
 	librtld_db \
+	libsbrk \
 	libsbuf \
 	libsmb \
 	libstdbuf \
diff --git a/lib/libsbrk/Makefile b/lib/libsbrk/Makefile
new file mode 100644
--- /dev/null
+++ b/lib/libsbrk/Makefile
@@ -0,0 +1,11 @@
+PACKAGE=	clibs
+LIB=		sbrk
+SHLIB_MAJOR=	1
+
+LDFLAGS+=-Wl,--filter=libc.so.7
+VERSION_DEF=${SRCTOP}/lib/libc/Versions.def
+SYMBOL_MAPS=${.CURDIR}/Symbol.map
+
+SRCS=		${LIB}.c
+
+.include <bsd.lib.mk>
diff --git a/lib/libsbrk/Symbol.map b/lib/libsbrk/Symbol.map
new file mode 100644
--- /dev/null
+++ b/lib/libsbrk/Symbol.map
@@ -0,0 +1,3 @@
+FBSD_1.0 {
+	sbrk;
+};
diff --git a/lib/libsbrk/sbrk.c b/lib/libsbrk/sbrk.c
new file mode 100644
--- /dev/null
+++ b/lib/libsbrk/sbrk.c
@@ -0,0 +1,43 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2023 SRI International
+ *
+ * This software was developed by SRI International, the University of
+ * Cambridge Computer Laboratory (Department of Computer Science and
+ * Technology), and Capabilities Limited under Defense Advanced Research
+ * Projects Agency (DARPA) Contract No. HR001122S0003 ("MTSS").
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <inttypes.h>
+
+void *sbrk(intptr_t);
+void *libc_sbrk(intptr_t);
+
+asm (".symver libc_sbrk, sbrk@FBSD_1.0");
+
+void *
+sbrk(intptr_t incr) {
+	return (libc_sbrk(incr));
+}
diff --git a/lib/libsys/brk.2 b/lib/libsys/brk.2
--- a/lib/libsys/brk.2
+++ b/lib/libsys/brk.2
@@ -33,7 +33,7 @@
 .Nm sbrk
 .Nd change data segment size
 .Sh LIBRARY
-.Lb libc
+.Lb libsbrk
 .Sh SYNOPSIS
 .In unistd.h
 .Ft int
@@ -81,6 +81,11 @@
 function
 sets the break to
 .Fa addr .
+.Bf -symbolic
+It is implemented in the
+.Lb libc
+as a compatibility symbol and no mechanism is provided to link it.
+.Ef
 .Pp
 The
 .Fn sbrk
@@ -95,6 +100,12 @@
 the break is lowered by
 .Fa incr
 bytes.
+.Bf -symbolic
+It is implemented in the
+.Lb libc
+as a compatibility symbol and can be linked via the
+.Lb libsbrk .
+.Ef
 .Sh NOTES
 While the actual process data segment size maintained by the kernel will only
 grow or shrink in page sizes, these functions allow setting the break