diff --git a/configs/teensy/nsh/defconfig b/configs/teensy/nsh/defconfig
index 95010358d69..f9bb1927c24 100755
--- a/configs/teensy/nsh/defconfig
+++ b/configs/teensy/nsh/defconfig
@@ -792,7 +792,7 @@ CONFIG_BOOT_COPYTORAM=n
 CONFIG_CUSTOM_STACK=n
 CONFIG_STACK_POINTER=
 CONFIG_IDLETHREAD_STACKSIZE=512
-CONFIG_USERMAIN_STACKSIZE=1024
+CONFIG_USERMAIN_STACKSIZE=512
 CONFIG_PTHREAD_STACK_MIN=256
 CONFIG_PTHREAD_STACK_DEFAULT=512
 CONFIG_HEAP_BASE=