diff --git a/SerialPort_USB.c b/SerialPort_USB.c
index 5024f04..80832ed 100644
--- a/SerialPort_USB.c
+++ b/SerialPort_USB.c
@@ -196,6 +196,7 @@ void usb1_gpio_config(void) {
 }
 
 void usb2_gpio_config(void) {
+#if (OTG2_USB_ID == 1)
     gpio_init_type gpio_init_struct;
 
     crm_periph_clock_enable(OTG2_PIN_GPIO_CLOCK, TRUE);
@@ -212,6 +213,7 @@ void usb2_gpio_config(void) {
 
     gpio_pin_mux_config(OTG2_PIN_GPIO, OTG2_PIN_DP_SOURCE, OTG2_PIN_MUX);
     gpio_pin_mux_config(OTG2_PIN_GPIO, OTG2_PIN_DM_SOURCE, OTG2_PIN_MUX);
+#endif
 
 #ifdef USB_SOF_OUTPUT_ENABLE
     crm_periph_clock_enable(OTG_PIN_SOF_GPIO_CLOCK, TRUE);
@@ -299,9 +301,11 @@ static uint16_t vSerialPortUsbTransmit(tSerialPortUsbArtery *env, uint8_t *data,
     }
 
     if (env->USB_ID == 2) {
+#if (OTG2_USB_ID == 1)
         if (usb_vcp_send_data(&otg2_core_struct.dev, data, size) == SUCCESS) {
             return size;
         }
+#endif
     }