diff --git a/SoObjects/Appointments/product.plist b/SoObjects/Appointments/product.plist
index d67007c45..5dcbe09f1 100644
--- a/SoObjects/Appointments/product.plist
+++ b/SoObjects/Appointments/product.plist
@@ -14,7 +14,7 @@
     SOGoWebAppointmentFolder = {
         superclass = "SOGoGCSFolder";
         defaultRoles = {
-            "Add Documents, Images, and Files" = ( );
+            "Add Documents, Images, and Files" = ( "ImpossibleWriter" );
             "Access Contents Information" = ( "Owner", "PublicResponder", "PublicModifier", "PublicViewer", "PublicDAndTViewer", "PrivateResponder", "PrivateModifier", "PrivateViewer", "PrivateDAndTViewer", "ConfidentialResponder", "ConfidentialModifier", "ConfidentialViewer", "ConfidentialDAndTViewer" );
             "ViewWholePublicRecords" = ( "Owner", "PublicResponder", "PublicModifier", "PublicViewer" );
             "ViewWholePrivateRecords" = ( "Owner", "PrivateResponder", "PrivateModifier", "PrivateViewer" );