--- QScintilla_gpl-2.10.8/designer-Qt4Qt5/designer.pro.orig	2019-01-06 23:27:53.938328784 +0100
+++ QScintilla_gpl-2.10.8/designer-Qt4Qt5/designer.pro	2019-01-06 23:29:42.925796588 +0100
@@ -24,3 +24,5 @@
 
 target.path = $$[QT_INSTALL_PLUGINS]/designer
 INSTALLS += target
+
+INCLUDEPATH = ../Qt4Qt5