diff --git a/lib/navigationlib.php b/lib/navigationlib.php
index 4048714d5ab..9bb60f9eae7 100644
--- a/lib/navigationlib.php
+++ b/lib/navigationlib.php
@@ -3045,6 +3045,7 @@ class global_navigation extends navigation_node {
                     self::TYPE_SETTING, null, 'privatefiles', new pix_icon('i/privatefiles', ''));
                 $node->display = false;
                 $node->showinflatnavigation = true;
+                $node->mainnavonly = true;
             }
         }
 
diff --git a/theme/boost/tests/behat/breadcrumb.feature b/theme/boost/tests/behat/breadcrumb.feature
index 2ec398e2db2..e9fabb3ba99 100644
--- a/theme/boost/tests/behat/breadcrumb.feature
+++ b/theme/boost/tests/behat/breadcrumb.feature
@@ -45,7 +45,7 @@ Feature: Breadcrumbs navigation
     And I should see "Cat 1" in the ".breadcrumb" "css_element"
     And I should see "Manage courses and categories" in the ".breadcrumb" "css_element"
 
-  Scenario: Admin user sets the default home page to 'Site' and navigates to its 'Preferences' page
+  Scenario: Admin user sets the default home page to 'Site' and navigates to its 'Preferences' and 'Private files' page
     Given the following config values are set as admin:
       | defaulthomepage | 0 |
     And I log in as "admin"
@@ -53,26 +53,35 @@ Feature: Breadcrumbs navigation
     # There should be no breadcrumbs on this page.
     Then ".breadcrumb-item" "css_element" should not exist in the ".breadcrumb" "css_element"
 
-  Scenario: Admin user sets the default home page to 'Dashboard' and navigates to its 'Preferences' page
+  Scenario: Admin user sets the default home page to 'Dashboard' and navigates to its 'Preferences' and 'Private files' page
     Given the following config values are set as admin:
       | defaulthomepage | 1 |
     And I log in as "admin"
     When I follow "Preferences" in the user menu
     # There should be no breadcrumbs on this page.
     Then ".breadcrumb-item" "css_element" should not exist in the ".breadcrumb" "css_element"
+    And I follow "Private files" in the user menu
+    # There should be no breadcrumbs on this page.
+    And ".breadcrumb-item" "css_element" should not exist in the ".breadcrumb" "css_element"
 
-  Scenario: Admin user sets the default home page to 'User preference' and navigates to its 'Preferences' page
+  Scenario: Admin user sets the default home page to 'User preference' and navigates to its 'Preferences' and 'Private files' page
     Given the following config values are set as admin:
       | defaulthomepage | 2 |
     And I log in as "admin"
     When I follow "Preferences" in the user menu
     # There should be no breadcrumbs on this page.
     Then ".breadcrumb-item" "css_element" should not exist in the ".breadcrumb" "css_element"
+    And I follow "Private files" in the user menu
+    # There should be no breadcrumbs on this page.
+    And ".breadcrumb-item" "css_element" should not exist in the ".breadcrumb" "css_element"
 
-  Scenario: Admin user sets the default home page to 'My courses' and navigates to its 'Preferences' page
+  Scenario: Admin user sets the default home page to 'My courses' and navigates to its 'Preferences' and 'Private files' page
     Given the following config values are set as admin:
       | defaulthomepage | 3 |
     And I log in as "admin"
     When I follow "Preferences" in the user menu
     # There should be no breadcrumbs on this page.
     Then ".breadcrumb-item" "css_element" should not exist in the ".breadcrumb" "css_element"
+    And I follow "Private files" in the user menu
+    # There should be no breadcrumbs on this page.
+    And ".breadcrumb-item" "css_element" should not exist in the ".breadcrumb" "css_element"