diff --git a/nuttx-configs/px4fmu-v1/nsh/defconfig b/nuttx-configs/px4fmu-v1/nsh/defconfig
index c599b118f7..bc0c120679 100644
--- a/nuttx-configs/px4fmu-v1/nsh/defconfig
+++ b/nuttx-configs/px4fmu-v1/nsh/defconfig
@@ -418,7 +418,7 @@ CONFIG_PREALLOC_TIMERS=50
 # Stack and heap information
 #
 CONFIG_IDLETHREAD_STACKSIZE=4096
-CONFIG_USERMAIN_STACKSIZE=4096
+CONFIG_USERMAIN_STACKSIZE=3500
 CONFIG_PTHREAD_STACK_MIN=512
 CONFIG_PTHREAD_STACK_DEFAULT=2048