--- qmake/generators/makefile.cpp.orig	2018-12-03 04:15:26.000000000 -0700
+++ qmake/generators/makefile.cpp	2018-12-22 06:02:13.000000000 -0700
@@ -3423,7 +3423,7 @@
         t << "-I${includedir}";
     if (target_mode == TARG_MAC_MODE && project->isActiveConfig("lib_bundle")
         && libDir != QLatin1String("/Library/Frameworks")) {
-            t << " -F${libdir}";
+            t << " -F${libdir} -I${prefix}/include";
     }
     t << Qt::endl;