diff --git a/nuttx/configs/px4fmu/nsh/defconfig b/nuttx/configs/px4fmu/nsh/defconfig
index f43519edc9..74acb38883 100755
--- a/nuttx/configs/px4fmu/nsh/defconfig
+++ b/nuttx/configs/px4fmu/nsh/defconfig
@@ -1020,7 +1020,9 @@ CONFIG_CUSTOM_STACK=n
 CONFIG_STACK_POINTER=
 # Idle thread needs 4096 bytes
 # default 1 KB is not enough
+# 4096 bytes 
 CONFIG_IDLETHREAD_STACKSIZE=6000
+# USERMAIN stack size probably needs to be around 4096 bytes
 CONFIG_USERMAIN_STACKSIZE=4096
 CONFIG_PTHREAD_STACK_MIN=512
 CONFIG_PTHREAD_STACK_DEFAULT=2048