diff --git a/lib/libmixer/Makefile b/lib/libmixer/Makefile
--- a/lib/libmixer/Makefile
+++ b/lib/libmixer/Makefile
@@ -4,5 +4,6 @@
 SRCS=		${LIB}.c
 INCS=		${LIB}.h
 MAN=		${LIB}.3
+SYMBOL_MAPS=	Symbol.map
 
 .include <bsd.lib.mk>
diff --git a/lib/libmixer/Symbol.map b/lib/libmixer/Symbol.map
new file mode 100644
--- /dev/null
+++ b/lib/libmixer/Symbol.map
@@ -0,0 +1,22 @@
+/*
+ * $FreeBSD$
+ */
+
+LIBMIXER_1.0 {
+	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;
+};