--- qTox-1.10.0/src/persistence/db/rawdatabase.h.orig	2017-05-07 19:58:03.000000000 +0200
+++ qTox-1.10.0/src/persistence/db/rawdatabase.h	2017-05-11 17:15:25.501477422 +0200
@@ -11,6 +11,7 @@
 #include <QVector>
 #include <atomic>
 #include <memory>
+#include <functional>
 
 struct sqlite3;
 struct sqlite3_stmt;