diff --git a/mod/forum/post.php b/mod/forum/post.php
index 9976c87642d..39249e6f426 100644
--- a/mod/forum/post.php
+++ b/mod/forum/post.php
@@ -232,7 +232,7 @@
         }
     }
 
-    if ($usehtmleditor = can_use_richtext_editor()) {
+    if ($usehtmleditor = can_use_html_editor()) {
         $defaultformat = FORMAT_HTML;
     } else {
         $defaultformat = FORMAT_MOODLE;