diff --git a/ports/cef/regen_interface_mod_rs.sh b/ports/cef/regen_interface_mod_rs.sh
index 665a50957e0..aca6594b33d 100755
--- a/ports/cef/regen_interface_mod_rs.sh
+++ b/ports/cef/regen_interface_mod_rs.sh
@@ -6,11 +6,11 @@
 
 
 setopt extended_glob
-echo -e $(cat << END_MPL
-/* This Source Code Form is subject to the terms of the Mozilla Public\n
- * License, v. 2.0. If a copy of the MPL was not distributed with this\n
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */\n
-END_MPL) >>| interfaces_mod.rs
+echo \
+"/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+" >>| interfaces_mod.rs
 
 # loop all files in interfaces dir
 for x in $(print interfaces/*.rs~interfaces/mod.rs)