diff --git a/include/wx/generic/Makefile.am b/include/wx/generic/Makefile.am
index d192e3533e..145cbb35a7 100644
--- a/include/wx/generic/Makefile.am
+++ b/include/wx/generic/Makefile.am
@@ -15,6 +15,7 @@ wx_generic_include_HEADERS = \
  fontdlgg.h \
  gridg.h \
  helpext.h \
+ helpwxht.h \
  helphtml.h \
  helpxlp.h \
  imaglist.h \