diff --git a/doc/plugin-example.js b/doc/plugin-example.js
index da75d52a..518a9b7f 100644
--- a/doc/plugin-example.js
+++ b/doc/plugin-example.js
@@ -18,6 +18,8 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  *
  */
+
+"use strict";
 define(['angular'], function(angular) {
 
 	return {
diff --git a/doc/plugin-test-authorize.js b/doc/plugin-test-authorize.js
index 35f9b5ce..0c005fb5 100644
--- a/doc/plugin-test-authorize.js
+++ b/doc/plugin-test-authorize.js
@@ -18,6 +18,8 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  *
  */
+
+"use strict";
 define(['angular', 'sjcl'], function(angular, sjcl) {
 
 	return {