diff --git a/util/cpp/make.tokcase b/util/cpp/make.tokcase
index ef32292f9..6a64b2f9c 100755
--- a/util/cpp/make.tokcase
+++ b/util/cpp/make.tokcase
@@ -1,3 +1,5 @@
+#!/bin/sh
+
 cat <<'--EOT--'
 #include "Lpars.h"
 
diff --git a/util/cpp/make.tokfile b/util/cpp/make.tokfile
index 494b7e3cc..1ee50f6c3 100755
--- a/util/cpp/make.tokfile
+++ b/util/cpp/make.tokfile
@@ -1,3 +1,5 @@
+#!/bin/sh
+
 sed '
 /{[A-Z]/!d
 s/.*{//