diff --git a/lang/en/backup.php b/lang/en/backup.php
index e37caaa279f..01189fcff12 100644
--- a/lang/en/backup.php
+++ b/lang/en/backup.php
@@ -258,7 +258,7 @@ $string['skiphiddenhelp'] = 'Choose whether or not to skip hidden courses';
 $string['skipmodifdays'] = 'Skip courses not modified since';
 $string['skipmodifdayshelp'] = 'Choose to skip courses that have not been modified since a number of days';
 $string['skipmodifprev'] = 'Skip courses not modified since previous backup';
-$string['skipmodifprevhelp'] = 'Choose whether or not to skip courses that have not been modified since previous backup';
+$string['skipmodifprevhelp'] = 'Choose whether to skip courses that have not been modified since the last automatic backup. This requires logging to be enabled.';
 $string['title'] = 'Title';
 $string['totalcategorysearchresults'] = 'Total categories: {$a}';
 $string['totalcoursesearchresults'] = 'Total courses: {$a}';