diff --git a/libraries/AP_HAL_ChibiOS/hwdef/MatekF405-CAN/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/MatekF405-CAN/hwdef.dat
index c0ad772bc0..8b9db05c3f 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/MatekF405-CAN/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/MatekF405-CAN/hwdef.dat
@@ -81,6 +81,9 @@ PB8 CAN1_RX CAN1
 PB9 CAN1_TX CAN1
 PC13 GPIO_CAN1_SILENT OUTPUT PUSHPULL SPEED_LOW LOW GPIO(70)
 
+# reduce memory usage
+define UAVCAN_NODE_POOL_SIZE 1024
+
 
 # --------------------- UARTs ---------------------------
 SERIAL_ORDER OTG1 USART1 USART3 UART4 UART5 USART2