diff --git a/build/tools/bld_chm_exe.bat b/build/tools/bld_chm_exe.bat
index fe76b22b57..9b2f55f7a2 100644
--- a/build/tools/bld_chm_exe.bat
+++ b/build/tools/bld_chm_exe.bat
@@ -1,5 +1,5 @@
 rem Uncomment the next line to set the version; used also in wxWidgets.iss
-SET WXW_VER=2.9.3
+SET WXW_VER=2.9.3-rc1
 if (%WXW_VER%)==() SET WXW_VER=SVN
 
 echo docs building for %WXW_VER%