diff --git a/platforms/stm32h563/src/fdcan.c b/platforms/stm32h563/src/fdcan.c
index 0198473e..e26f0cbd 100644
--- a/platforms/stm32h563/src/fdcan.c
+++ b/platforms/stm32h563/src/fdcan.c
@@ -37,6 +37,13 @@ HAL_StatusTypeDef can_init(can_t *can, FDCAN_HandleTypeDef *hcan)
 		return status;
 	}
 
+	/* Set up the global filter to reject all messages by default. You must explicitly add messages to your filters in the app layer to receive them. */
+	status = HAL_FDCAN_ConfigGlobalFilter(hcan, FDCAN_REJECT, FDCAN_REJECT, FDCAN_REJECT_REMOTE, FDCAN_REJECT_REMOTE);
+	if(status != HAL_OK) {
+		printf("[fdcan.c/can_init()] ERROR: Failed to run HAL_FDCAN_ConfigGlobalFilter() (Status: %d).\n", status);
+		return status;
+	}
+
 	return status;
 }