diff --git a/lib/libmixer/Makefile b/lib/libmixer/Makefile
index 12081ee3835b..d7e77f79856e 100644
--- a/lib/libmixer/Makefile
+++ b/lib/libmixer/Makefile
@@ -1,8 +1,10 @@
 # $FreeBSD$
 
 LIB=		mixer
 SRCS=		${LIB}.c
 INCS=		${LIB}.h
 MAN=		${LIB}.3
+VERSION_DEF=	${LIBCSRCDIR}/Versions.def
+SYMBOL_MAPS=	${.CURDIR}/Symbol.map
 
 .include <bsd.lib.mk>
diff --git a/lib/libmixer/Symbol.map b/lib/libmixer/Symbol.map
new file mode 100644
index 000000000000..6736debe1897
--- /dev/null
+++ b/lib/libmixer/Symbol.map
@@ -0,0 +1,22 @@
+/*
+ * $FreeBSD$
+ */
+
+FBSD_1.7 {
+	mixer_open;
+	mixer_close;
+	mixer_get_dev;
+	mixer_get_dev_byname;
+	mixer_add_ctl;
+	mixer_add_ctl_s;
+	mixer_remove_ctl;
+	mixer_get_ctl;
+	mixer_get_ctl_byname;
+	mixer_set_vol;
+	mixer_set_mute;
+	mixer_mod_recsrc;
+	mixer_get_default_unit;
+	mixer_set_default_unit;
+	mixer_get_mode;
+	mixer_get_nmixers;
+};