diff --git a/nuttx-configs/px4fmu-v1/nsh/defconfig b/nuttx-configs/px4fmu-v1/nsh/defconfig
index f2c7d22bfe..6717ae19a8 100644
--- a/nuttx-configs/px4fmu-v1/nsh/defconfig
+++ b/nuttx-configs/px4fmu-v1/nsh/defconfig
@@ -417,8 +417,8 @@ CONFIG_PREALLOC_TIMERS=50
 #
 # Stack and heap information
 #
-CONFIG_IDLETHREAD_STACKSIZE=4096
-CONFIG_USERMAIN_STACKSIZE=3500
+CONFIG_IDLETHREAD_STACKSIZE=3500
+CONFIG_USERMAIN_STACKSIZE=3000
 CONFIG_PTHREAD_STACK_MIN=512
 CONFIG_PTHREAD_STACK_DEFAULT=2048