diff --git a/build/bakefiles/files.bkl b/build/bakefiles/files.bkl
index 3461d4d3b0..a24db7b10e 100644
--- a/build/bakefiles/files.bkl
+++ b/build/bakefiles/files.bkl
@@ -231,6 +231,7 @@ IMPORTANT: please read docs/tech/tn0016.txt before modifying this file!
     wx/os2/apptrait.h
     wx/os2/mimetype.h
     wx/os2/stdpaths.h
+    wx/os2/chkconf.h
 </set>
 
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