diff --git a/lang/en/admin.php b/lang/en/admin.php
index 90e2c99ea63..9b4543ffa51 100644
--- a/lang/en/admin.php
+++ b/lang/en/admin.php
@@ -1019,7 +1019,6 @@ $string['taskcachecleanup'] = 'Remove expired cache entries';
 $string['taskcachecron'] = 'Background processing for caches';
 $string['taskcalendarcron'] = 'Send calendar notifications';
 $string['taskcheckforupdates'] = 'Check for updates';
-$string['taskcompletioncron'] = 'Calculate completion data';
 $string['taskcompletionregular'] = 'Calculate regular completion data';
 $string['taskcompletiondaily'] = 'Completion mark as started';
 $string['taskcontextcleanup'] = 'Cleanup contexts';