diff --git a/blocks/completionstatus/block_completionstatus.php b/blocks/completionstatus/block_completionstatus.php
index 07a7b473a6c..0daec7c852d 100644
--- a/blocks/completionstatus/block_completionstatus.php
+++ b/blocks/completionstatus/block_completionstatus.php
@@ -171,7 +171,7 @@ class block_completionstatus extends block_base {
             $a = new stdClass();
             $a->first = $prerequisites_complete;
             $a->second = count($prerequisites);
-            $shtml .= get_string('firstofsecond', 'block_completionstatus', $a);
+            $phtml .= get_string('firstofsecond', 'block_completionstatus', $a);
             $phtml .= '</td></tr>';
 
             $shtml = $phtml . $shtml;