diff --git a/modules/src/em_code/make.em.gen b/modules/src/em_code/make.em.gen
index 285b2855f..57553f841 100755
--- a/modules/src/em_code/make.em.gen
+++ b/modules/src/em_code/make.em.gen
@@ -1,3 +1,4 @@
+#!/bin/sh
 echo "/* this part is generated from $1 at: " `date` "*/"
 ed -s $1 <<'EOI' 
 1,/^$/d