diff --git a/main/install/configuration.dist.php b/main/install/configuration.dist.php
index 527c48b9b3..2de3264591 100755
--- a/main/install/configuration.dist.php
+++ b/main/install/configuration.dist.php
@@ -1021,3 +1021,6 @@ VALUES (2, 13, 'session_courses_read_only_mode', 'Lock Course In Session', 1, 1,
 // You need add a new option called "confirmation" to the registration settings
 //INSERT INTO settings_options (variable, value, display_text) VALUES ('allow_registration', 'confirmation', 'MailConfirmation');
 // ------ (End) Custom DB changes
+
+// Activate the view with ViewerJS for PDF files within the lessons for IPad and IPhone
+// $_configuration['allow_pdf_viewerjs_in_lp'] = false;
\ No newline at end of file