diff --git a/docs/html/update_lcl_docs.lpr b/docs/html/update_lcl_docs.lpr
index 2bfa4d7c91..88725f7538 100644
--- a/docs/html/update_lcl_docs.lpr
+++ b/docs/html/update_lcl_docs.lpr
@@ -129,9 +129,6 @@ begin
     begin
       SetString(RTLPrefix, 'ms-its:rtl.chm::/', 'RTLLINKPREFIX');
       SetString(FCLPrefix, 'ms-its:fcl.chm::/', 'FCLLINKPREFIX');
-      ArgParams:=ArgParams+' --output='+ ChangeFileExt(PackageName, '.chm')
-                          +' --auto-toc --auto-index'
-                          +' --css-file=..'+PathDelim+'fpdoc.css ';
     end
     else
     begin
@@ -146,6 +143,13 @@ begin
       FCLPrefix := ','+FCLPrefix;
   end;
   
+  if OutFormat='chm' then
+  begin
+    ArgParams:=ArgParams+' --output='+ ChangeFileExt(PackageName, '.chm')
+                          +' --auto-toc --auto-index'
+                          +' --css-file=..'+PathDelim+'fpdoc.css ';
+  end;
+  
   ArgParams:=ArgParams+' --format='+OutFormat+' ';
 end;