diff --git a/notebooktab.h b/notebooktab.h
index 4b015f72a..617e1f1fa 100644
--- a/notebooktab.h
+++ b/notebooktab.h
@@ -2,9 +2,10 @@
 #define NOTEBOOKTAB_H
 
 #include "QObject"
-#include "notebook.h"
 #include "notebookpage.h"
 
+class Notebook;
+
 class NotebookTab : public QWidget
 {
 Q_OBJECT