diff --git a/lib/editor/tinymce/lib.php b/lib/editor/tinymce/lib.php
index 3fca21ed0a8..16e70f24131 100644
--- a/lib/editor/tinymce/lib.php
+++ b/lib/editor/tinymce/lib.php
@@ -155,7 +155,7 @@ class tinymce_texteditor extends texteditor {
                     'min_height' => 30,
                     'theme_advanced_toolbar_location' => "top",
                     'theme_advanced_statusbar_location' => "bottom",
-                    'spellchecker_rpc_url' => $CFG->wwwroot."/lib/editor/tinymce/tiny_mce/$this->version/plugins/spellchecker/rpc.php",
+                    'spellchecker_rpc_url' => $CFG->httpswwwroot."/lib/editor/tinymce/tiny_mce/$this->version/plugins/spellchecker/rpc.php",
                     'spellchecker_languages' => $spelllanguagelist
                   );