diff --git a/src/libs/ifc/xml/vdomdocument.h b/src/libs/ifc/xml/vdomdocument.h
index 077a658d5..b0feda21f 100644
--- a/src/libs/ifc/xml/vdomdocument.h
+++ b/src/libs/ifc/xml/vdomdocument.h
@@ -42,6 +42,7 @@
 #include <QtGlobal>
 #include <QLocale>
 #include <QLoggingCategory>
+#include <functional>
 
 #include "../ifc/ifcdef.h"
 #include "../vmisc/def.h"