diff --git a/setup.h.in b/setup.h.in
index 866296b1bf..306348bfd3 100644
--- a/setup.h.in
+++ b/setup.h.in
@@ -449,6 +449,8 @@
 
 #define wxUSE_HELP        0
 
+#define wxUSE_MS_HTML_HELP 0
+
 
 #define wxUSE_WXHTML_HELP 0