diff --git a/lib/libprocstat/Makefile b/lib/libprocstat/Makefile
index e289ef51dbbe..e5091694e86c 100644
--- a/lib/libprocstat/Makefile
+++ b/lib/libprocstat/Makefile
@@ -12,6 +12,9 @@ SRCS=	cd9660.c	\
 	smbfs.c		\
 	udf.c
 
+VERSION_DEF=	${.CURDIR}/Versions.def
+SYMBOL_MAPS=	${.CURDIR}/Symbol.map
+
 INCS=	libprocstat.h
 CFLAGS+=	-I. -I${.CURDIR} -D_KVM_VNODE
 SHLIB_MAJOR=	1
diff --git a/lib/libprocstat/Symbol.map b/lib/libprocstat/Symbol.map
new file mode 100644
index 000000000000..b5d64d0ff78e
--- /dev/null
+++ b/lib/libprocstat/Symbol.map
@@ -0,0 +1,16 @@
+/*
+ * $FreeBSD$
+ */
+FBSD_1.2 {
+	procstat_close;
+	procstat_freefiles;
+	procstat_freeprocs;
+	procstat_get_pipe_info;
+	procstat_get_pts_info;
+	procstat_get_socket_info;
+	procstat_get_vnode_info;
+	procstat_getfiles;
+	procstat_getprocs;
+	procstat_open_kvm;
+	procstat_open_sysctl;
+};
diff --git a/lib/libprocstat/Versions.def b/lib/libprocstat/Versions.def
new file mode 100644
index 000000000000..d69f5c996f75
--- /dev/null
+++ b/lib/libprocstat/Versions.def
@@ -0,0 +1,5 @@
+# $FreeBSD$
+
+# This version was first added to 9.0-current.
+FBSD_1.2 {
+};