diff --git a/utils/fpdoc/dwriter.pp b/utils/fpdoc/dwriter.pp
index fc0783e51c..500fe02c09 100644
--- a/utils/fpdoc/dwriter.pp
+++ b/utils/fpdoc/dwriter.pp
@@ -721,7 +721,7 @@ end;
 function TMultiFileDocWriter.GetFileBaseDir(aOutput: String) : String;
 
 begin
-  Result:=Engine.Output;
+  Result:=aOutput;
   if Result<>'' then
     Result:=IncludeTrailingPathDelimiter(Result);
 end;