diff --git a/src/shared/help/bookmarkmanager.cpp b/src/shared/help/bookmarkmanager.cpp
index c097fb5876c..1515f5e7e8f 100644
--- a/src/shared/help/bookmarkmanager.cpp
+++ b/src/shared/help/bookmarkmanager.cpp
@@ -620,12 +620,12 @@ BookmarkManager::~BookmarkManager()
     listModel->clear();
 }
 
-BookmarkModel* BookmarkManager::treeBookmarkModel()
+BookmarkModel* BookmarkManager::treeBookmarkModel() const
 {
     return treeModel;
 }
 
-BookmarkModel* BookmarkManager::listBookmarkModel()
+BookmarkModel* BookmarkManager::listBookmarkModel() const
 {
     return listModel;
 }
diff --git a/src/shared/help/bookmarkmanager.h b/src/shared/help/bookmarkmanager.h
index 977433c5cee..73ad5c4ab7a 100644
--- a/src/shared/help/bookmarkmanager.h
+++ b/src/shared/help/bookmarkmanager.h
@@ -161,8 +161,8 @@ public:
     BookmarkManager(QHelpEngineCore *helpEngine);
     ~BookmarkManager();
 
-    BookmarkModel *treeBookmarkModel();
-    BookmarkModel *listBookmarkModel();
+    BookmarkModel *treeBookmarkModel() const;
+    BookmarkModel *listBookmarkModel() const;
 
     void saveBookmarks();
     QStringList bookmarkFolders() const;