diff --git a/lib/plagiarismlib.php b/lib/plagiarismlib.php
index 7b5b1f4f1c9..cb0e52174b3 100644
--- a/lib/plagiarismlib.php
+++ b/lib/plagiarismlib.php
@@ -135,7 +135,7 @@ function plagiarism_get_form_elements_module($mform, $context, $modulename = "")
     }
 }
 /**
- * updates the status of all files within a module
+ * Allows a plagiarism plugin to print a button/link at the top of activity overview report pages.
  *
  * @param object $course - full Course object
  * @param object $cm - full cm object