diff --git a/src/SearchTab.h b/src/SearchTab.h
index 0c6e62299..545d0cc47 100644
--- a/src/SearchTab.h
+++ b/src/SearchTab.h
@@ -27,6 +27,7 @@
 class SearchListDelegate;
 class SearchEngine;
 class QTreeView;
+class QHeaderView;
 class QStandardItemModel;
 
 class SearchTab : public QWidget, public Ui::search_engine