diff --git a/ui/sourceiconview.h b/ui/sourceiconview.h
index e561a7a6f..e84d64adc 100644
--- a/ui/sourceiconview.h
+++ b/ui/sourceiconview.h
@@ -22,6 +22,7 @@
 #define SOURCEICONVIEW_H
 
 #include <QListView>
+#include <QDropEvent>
 
 class Project;