diff --git a/boards/nxp/fmuk66-e/init/rc.board_defaults b/boards/nxp/fmuk66-e/init/rc.board_defaults
index 531e7fde58..b304023452 100644
--- a/boards/nxp/fmuk66-e/init/rc.board_defaults
+++ b/boards/nxp/fmuk66-e/init/rc.board_defaults
@@ -1,4 +1,4 @@
-
+#!/bin/sh
 #
 # NXP fmuk66-e specific board defaults
 #------------------------------------------------------------------------------