diff --git a/tools/install/oc.nsi b/tools/install/oc.nsi
index 24d8eebf5..c19e2b364 100644
--- a/tools/install/oc.nsi
+++ b/tools/install/oc.nsi
@@ -94,6 +94,7 @@ Section
 
   File "*.oc?"
   
+  ; delete obsolete folders
   Delete "BackToTheRocks.ocf"
   Delete "BeyondTheRocks.ocf"