-#define wxHelpController wxWinHelpController
-#define sm_classwxHelpController sm_classwxWinHelpController
-#elif defined(__WXGTK__)
-#define wxHelpController wxExtHelpController
-#define sm_classwxHelpController sm_classwxExtHelpController
+ #include "wx/msw/helpwin.h"
+
+ #define wxHelpController wxWinHelpController
+ #define sm_classwxHelpController sm_classwxWinHelpController
+#else // !MSW
+
+/* By default, if wxHTML is compiled in, use the
+ wxHelpControllerHtml. If not, use the external help controller.
+ (of course, we shouldn't do it for wxMSW)
+*/
+
+#if wxUSE_HTML
+# include "wx/generic/helpwxht.h"
+# define wxHelpController wxHelpControllerHtml
+# define sm_classwxHelpController sm_classwxHelpControllerHtml