diff --git a/course/management.php b/course/management.php
index 5afc685bb5b..94e02aaa951 100644
--- a/course/management.php
+++ b/course/management.php
@@ -455,7 +455,7 @@ if ($viewmode === 'default' || $viewmode === 'combined') {
     }
 }
 if ($viewmode === 'default' || $viewmode === 'combined') {
-    $class .= ' viewmode-cobmined';
+    $class .= ' viewmode-combined';
 } else {
     $class .= ' viewmode-'.$viewmode;
 }
diff --git a/theme/upgrade.txt b/theme/upgrade.txt
index a67d8a8cf0c..b52dbc47e34 100644
--- a/theme/upgrade.txt
+++ b/theme/upgrade.txt
@@ -1,6 +1,9 @@
 This files describes API changes in /theme/* themes,
 information provided here is intended especially for theme designer.
 
+=== 3.11 ===
+* The classname 'viewmode-cobmined' in course/management.php has been changed to 'viewmode-combined'
+
 === 3.10 ===
 * The Bootstrap legacy css utilities from Bootstrap 2 and 4alpha have been removed.
 The syntax for the new Bootstrap 4.5 utility classes is {property}{sides}-{breakpoint}-{size} for sm, md, lg, and xl.