diff --git a/src/plugins/projectexplorer/projectwizardpage.h b/src/plugins/projectexplorer/projectwizardpage.h
index 6a92594bc22..5618d39cc48 100644
--- a/src/plugins/projectexplorer/projectwizardpage.h
+++ b/src/plugins/projectexplorer/projectwizardpage.h
@@ -34,6 +34,7 @@
 
 QT_BEGIN_NAMESPACE
 class QTreeView;
+class QModelIndex;
 QT_END_NAMESPACE
 
 namespace ProjectExplorer {