diff --git a/src/MainUtils.pas b/src/MainUtils.pas
index 16f4540..ce7ede2 100644
--- a/src/MainUtils.pas
+++ b/src/MainUtils.pas
@@ -584,7 +584,12 @@ function TDocumentConverter.Execute: string;
         loginfo('Output Extension is ' + outputExt, CHATTY);
       end;
 
-      OutputFile :=  OutputFile  + ChangeFileExt( ExtractFileName(InputFile),OutputExt);
+      if InputIsFile then
+      begin
+        OutputFile :=  OutputFile  + ChangeFileExt( ExtractFileName(InputFile),OutputExt);
+      end;
+
+
     end;
 
     // Add file to InputFiles List if only one.