diff --git a/distrib/scripts/manifests/mgl.rsp b/distrib/scripts/manifests/mgl.rsp
index 1b93cb07ed..3ccbf8a33e 100644
--- a/distrib/scripts/manifests/mgl.rsp
+++ b/distrib/scripts/manifests/mgl.rsp
@@ -4,6 +4,7 @@ readme-mgl.txt
 build/mgl/*
 
 include/wx/mgl/*.h
+include/wx/mgl/private/*.h
 src/mgl/*.cpp
 src/mgl/*.lst