diff --git a/platforms/nuttx/init/stm32f7/rc.board_arch_defaults b/platforms/nuttx/init/stm32f7/rc.board_arch_defaults
index 2c71f7470c..c22d9586e0 100644
--- a/platforms/nuttx/init/stm32f7/rc.board_arch_defaults
+++ b/platforms/nuttx/init/stm32f7/rc.board_arch_defaults
@@ -13,4 +13,4 @@ param set-default -s MC_AT_EN 1
 
 param set-default -s UAVCAN_ENABLE 2
 
-set LOGGER_BUF 64
+set LOGGER_BUF 40