--- file_not_specified_in_diff	
+++ file_not_specified_in_diff	
@@ -, +, @@ 
--- /kadu-core/plugin/dependency-graph/plugin-dependency-graph-builder.h
+++ /kadu-core/plugin/dependency-graph/plugin-dependency-graph-builder.h
@@ -20,6 +20,7 @@ 
 #pragma once
 
 #include <QtCore/QObject>
+#include <functional>
 #include <map>
 #include <set>