diff --git a/platforms/nuttx/src/px4/common/tasks.cpp b/platforms/nuttx/src/px4/common/tasks.cpp
index ff22f799640a..7d3b65f84ba5 100644
--- a/platforms/nuttx/src/px4/common/tasks.cpp
+++ b/platforms/nuttx/src/px4/common/tasks.cpp
@@ -66,7 +66,7 @@ int px4_task_spawn_cmd(const char *name, int scheduler, int priority, int stack_
 {
 	sched_lock();
 
-#if !defined(CONFIG_DISABLE_ENVIRON) && !defined(__KERNEL__)
+#if !defined(CONFIG_DISABLE_ENVIRON) && !defined(CONFIG_BUILD_KERNEL)
 	/* None of the modules access the environment variables (via getenv() for instance), so delete them
 	 * all. They are only used within the startup script, and NuttX automatically exports them to the children
 	 * tasks.