diff --git a/Makefile.in b/Makefile.in
index 40e42cdd23..b7ea69cdba 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -2097,6 +2097,7 @@ COND_TOOLKIT_GTK_TOOLKIT_VERSION_2_LOWLEVEL_HDR =  \
 	wx/gtk/minifram.h \
 	wx/gtk/pen.h \
 	wx/gtk/popupwin.h \
+	wx/gtk/private/win_gtk.h \
 	wx/gtk/region.h \
 	wx/gtk/tooltip.h \
 	wx/gtk/toplevel.h \
diff --git a/build/bakefiles/files.bkl b/build/bakefiles/files.bkl
index 979f455b8c..7b0dba2005 100644
--- a/build/bakefiles/files.bkl
+++ b/build/bakefiles/files.bkl
@@ -1058,6 +1058,7 @@ IMPORTANT: please read docs/tech/tn0016.txt before modifying this file!
     wx/gtk/minifram.h
     wx/gtk/pen.h
     wx/gtk/popupwin.h
+    wx/gtk/private/win_gtk.h
     wx/gtk/region.h
     wx/gtk/tooltip.h
     wx/gtk/toplevel.h