diff --git a/firmware/hackrf_usb/usb_api_transceiver.c b/firmware/hackrf_usb/usb_api_transceiver.c
index c3584219..624fd4aa 100644
--- a/firmware/hackrf_usb/usb_api_transceiver.c
+++ b/firmware/hackrf_usb/usb_api_transceiver.c
@@ -269,7 +269,12 @@ void transceiver_shutdown(void)
 	led_off(LED2);
 	led_off(LED3);
 	rf_path_set_direction(&rf_path, RF_PATH_DIRECTION_OFF);
-	m0_state.mode = M0_MODE_RX;
+	m0_state.mode = M0_MODE_IDLE;
+	// The M0 may already be waiting for the next SGPIO
+	// exchange interrupt. In order to ensure that the M0
+	// switches over to its idle loop, we need to set the
+	// SGPIO exchange interrupt flag here.
+	SGPIO_SET_STATUS_1 = (1 << SGPIO_SLICE_A);
 }
 
 void transceiver_startup(const transceiver_mode_t mode) {