diff --git a/client/properties.c b/client/properties.c
index ff96e6cd..02be6216 100644
--- a/client/properties.c
+++ b/client/properties.c
@@ -28,6 +28,24 @@
 
 #include "properties.h"
 
+bool properties_builder_append_on_off_variant(
+					struct l_dbus_message_builder *builder,
+					const char *value_str)
+{
+	if (!builder || !value_str)
+		return false;
+
+	if (!strcmp(value_str, "on"))
+		return l_dbus_message_builder_append_basic(builder, 'b',
+					&properties_on_off_opts[0].value);
+
+	if (!strcmp(value_str, "off"))
+		return l_dbus_message_builder_append_basic(builder, 'b',
+					&properties_on_off_opts[1].value);
+
+	return false;
+}
+
 bool properties_parse_args(char *args, char **name, char **value)
 {
 	char **arg_arr;
diff --git a/client/properties.h b/client/properties.h
index 24b2d52d..79e50856 100644
--- a/client/properties.h
+++ b/client/properties.h
@@ -20,4 +20,19 @@
  *
  */
 
+struct property_value_options {
+	const char *value_str;
+	const void *value;
+};
+
+static const struct property_value_options properties_on_off_opts[] = {
+	{ "on",  (void *) true },
+	{ "off", (void *) false },
+	{ }
+};
+
+bool properties_builder_append_on_off_variant(
+					struct l_dbus_message_builder *builder,
+					const char *value_str);
+
 bool properties_parse_args(char *args, char **name, char **value);