diff --git a/plugins/fmcomms2.c b/plugins/fmcomms2.c
index cd5735e65..9780627f9 100644
--- a/plugins/fmcomms2.c
+++ b/plugins/fmcomms2.c
@@ -573,8 +573,13 @@ static void filter_fir_update(void)
 {
 	bool rx = false, tx = false, rxtx = false;
 	struct iio_channel *chn;
+	int ret;
+
+	ret = iio_device_attr_read_bool(dev, "in_out_voltage_filter_fir_en", &rxtx);
 
-	iio_device_attr_read_bool(dev, "in_out_voltage_filter_fir_en", &rxtx);
+	if (ret < 0)
+		iio_channel_attr_read_bool(iio_device_find_channel(dev, "out", false),
+					 "voltage_filter_fir_en", &rxtx);
 
 	chn = iio_device_find_channel(dev, "voltage0", false);
 	if (chn)
@@ -596,6 +601,7 @@ static void filter_fir_update(void)
 static void filter_fir_enable(GtkToggleButton *button, gpointer data)
 {
 	bool rx, tx, rxtx, disable;
+	int ret;
 
 	if (gtk_toggle_button_get_active(button))
 		return;
@@ -606,8 +612,11 @@ static void filter_fir_enable(GtkToggleButton *button, gpointer data)
 	disable = gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON (disable_all_fir_filters));
 
 	if (rxtx || disable) {
-		iio_device_attr_write_bool(dev,
+		ret = iio_device_attr_write_bool(dev,
 				"in_out_voltage_filter_fir_en", rxtx);
+		if (ret < 0)
+			iio_channel_attr_write_bool(iio_device_find_channel(dev, "out", false),
+					 "voltage_filter_fir_en", rxtx);
 	} else {
 		struct iio_channel *chn;
 		if (rx) {