diff --git a/ui/sourceiconview.h b/ui/sourceiconview.h
index a396aa938..df872d01c 100644
--- a/ui/sourceiconview.h
+++ b/ui/sourceiconview.h
@@ -22,6 +22,7 @@
 #define SOURCEICONVIEW_H
 
 #include <QListView>
+#include <QDropEvent>
 
 #include "project/sourcescommon.h"