diff --git a/include/graphics/nxwm/nxwmconfig.hxx b/include/graphics/nxwm/nxwmconfig.hxx
index ac67a2407..ac91fde7c 100644
--- a/include/graphics/nxwm/nxwmconfig.hxx
+++ b/include/graphics/nxwm/nxwmconfig.hxx
@@ -79,8 +79,8 @@
  * exit.
  */
 
-#ifndef CONFIG_SCHED_ONEXIT
-#  warning "on_exit() support may be needed (CONFIG_SCHED_ONEXIT)"
+#if CONFIG_LIBC_MAX_EXITFUNS == 0
+#  warning "on_exit() support may be needed (CONFIG_LIBC_MAX_EXITFUNS)"
 #endif
 
 /**