diff --git a/firmware/common/ui_portapack.c b/firmware/common/ui_portapack.c
index 34a3e155..f24f5ae4 100644
--- a/firmware/common/ui_portapack.c
+++ b/firmware/common/ui_portapack.c
@@ -861,13 +861,11 @@ static ui_point_t portapack_ui_draw_db(ui_point_t point, const uint32_t db) {
 }
 
 static ui_point_t portapack_ui_draw_bw_mhz(ui_point_t point, const uint64_t hz) {
-	const uint32_t frac_digits = 2;
 	const uint32_t lsd = 1000000 / 100;
 	const uint32_t round_offset = lsd / 2;
 
 	const uint64_t hz_offset = hz + round_offset;
 	const uint32_t mhz = hz_offset / 1000000;
-	const uint32_t hz_remainder = hz_offset - (mhz * 1000000);
 	const uint32_t frac = hz_offset / lsd;
 
 	point = portapack_lcd_draw_int(point, mhz, 2);
@@ -931,6 +929,8 @@ static void portapack_ui_set_sample_rate(uint32_t sample_rate) {
 #if 0
 	ui_point_t point = { VALUES_X, 320 - 1 * 16 };
 	portapack_lcd_draw_int(point, sample_rate, 8);
+#else
+	(void)sample_rate;
 #endif
 }
 
@@ -994,6 +994,7 @@ static void portapack_ui_set_bb_tx_vga_gain(const uint32_t gain_db) {
 }
 
 static void portapack_ui_set_first_if_frequency(const uint64_t frequency) {
+	(void)frequency;
 }
 
 static void portapack_ui_set_filter(const rf_path_filter_t filter) {
@@ -1017,6 +1018,7 @@ static void portapack_ui_set_filter(const rf_path_filter_t filter) {
 }
 
 static void portapack_ui_set_antenna_bias(bool antenna_bias) {
+	(void)antenna_bias;
 }
 
 static const hackrf_ui_t portapack_ui = {
diff --git a/firmware/hackrf_usb/hackrf_usb.c b/firmware/hackrf_usb/hackrf_usb.c
index 7574f4a6..47885032 100644
--- a/firmware/hackrf_usb/hackrf_usb.c
+++ b/firmware/hackrf_usb/hackrf_usb.c
@@ -143,12 +143,14 @@ static usb_request_handler_fn vendor_request_handler[] = {
 static const uint32_t vendor_request_handler_count =
 	sizeof(vendor_request_handler) / sizeof(vendor_request_handler[0]);
 
+#ifndef USER_INTERFACE_PORTAPACK
 static void operacake_usb_handlers_init(void) {
 	vendor_request_handler[HACKRF_VENDOR_REQUEST_OPERACAKE_GET_BOARDS] = usb_vendor_request_operacake_get_boards;
 	vendor_request_handler[HACKRF_VENDOR_REQUEST_OPERACAKE_SET_PORTS ] = usb_vendor_request_operacake_set_ports;
 	vendor_request_handler[HACKRF_VENDOR_REQUEST_OPERACAKE_SET_RANGES] = usb_vendor_request_operacake_set_ranges;
 	vendor_request_handler[HACKRF_VENDOR_REQUEST_OPERACAKE_GPIO_TEST ] = usb_vendor_request_operacake_gpio_test;
 }
+#endif
 
 usb_request_status_t usb_vendor_request(
 	usb_endpoint_t* const endpoint,