diff --git a/src/main.c b/src/main.c
index cb38a58..3b8367b 100644
--- a/src/main.c
+++ b/src/main.c
@@ -187,10 +187,6 @@ void write6502(uint16_t address, uint8_t value) {
 
 }
 
-void usb_lp_can_rx0_isr(void) {
-	usbd_poll(usbd_dev);
-}
-
 int main(void)
 {
 	setup_clock();
@@ -202,12 +198,11 @@ int main(void)
 	usbd_register_set_config_callback(usbd_dev, usb_set_config);
 	usbd_register_reset_callback(usbd_dev, usb_reset);
 
-	nvic_set_priority(NVIC_USB_LP_CAN_RX0_IRQ, 2 << 4);
-	nvic_enable_irq(NVIC_USB_LP_CAN_RX0_IRQ);
-
 	reset6502();
 
 	while (1) {
+		usbd_poll(usbd_dev);
+
 		if (!paused) {
 			step6502();
 			gpio_toggle(GPIOC, GPIO13);