diff --git a/Plugin-migration-to-QGIS-3.md b/Plugin-migration-to-QGIS-3.md
index b02adc3..4dd5509 100644
--- a/Plugin-migration-to-QGIS-3.md
+++ b/Plugin-migration-to-QGIS-3.md
@@ -13,6 +13,7 @@ When completed, we need to put out a call for plugin authors to start porting.
 - `pip install future`
 - run QGIS/scripts/2to3 (https://github.com/qgis/QGIS/blob/master/scripts/2to3) on your plugin
   - `path/to/QGIS/scripts/2to3 /path/to/your/plugin`
+  - This command will print the diff. If you want to write these changes to files, use `-w`
 - have a good look at: https://qgis.org/api/api_break.html
 - make sure you do python3 and QT5 !
 - tweak and fix until it works :-)