diff --git a/libraries/AP_HAL_ChibiOS/CANFDIface.cpp b/libraries/AP_HAL_ChibiOS/CANFDIface.cpp
index 9a1a29c6e7..2fc4a1b4f8 100644
--- a/libraries/AP_HAL_ChibiOS/CANFDIface.cpp
+++ b/libraries/AP_HAL_ChibiOS/CANFDIface.cpp
@@ -574,10 +574,12 @@ bool CANIface::init(const uint32_t bitrate, const OperatingMode mode)
             nvicEnableVector(FDCAN1_IT0_IRQn, CORTEX_MAX_KERNEL_PRIORITY);
             nvicEnableVector(FDCAN1_IT1_IRQn, CORTEX_MAX_KERNEL_PRIORITY);
             break;
+#ifdef FDCAN2_IT0_IRQn
         case 1:
             nvicEnableVector(FDCAN2_IT0_IRQn, CORTEX_MAX_KERNEL_PRIORITY);
             nvicEnableVector(FDCAN2_IT1_IRQn, CORTEX_MAX_KERNEL_PRIORITY);
             break;
+#endif
 #ifdef FDCAN3_IT0_IRQn
         case 2:
             nvicEnableVector(FDCAN3_IT0_IRQn, CORTEX_MAX_KERNEL_PRIORITY);