diff --git a/gui/resultstree.h b/gui/resultstree.h
index baa9ee266..37aa8760b 100644
--- a/gui/resultstree.h
+++ b/gui/resultstree.h
@@ -27,7 +27,7 @@
 #include <QContextMenuEvent>
 #include "common.h"
 #include "applicationlist.h"
-
+#include <QTextStream>
 
 /**
 * @brief Cppcheck's results are shown in this tree