diff --git a/Kernel/Modules/AgentTicketEmail.pm b/Kernel/Modules/AgentTicketEmail.pm
index 4711e8933a..5a378d9874 100644
--- a/Kernel/Modules/AgentTicketEmail.pm
+++ b/Kernel/Modules/AgentTicketEmail.pm
@@ -3213,7 +3213,7 @@ sub _MaskEmailNew {
     $Param{OptionStrg} = $LayoutObject->BuildSelection(
         Data         => $Param{Users},
         SelectedID   => $Param{UserSelected},
-        Class        => 'Modernize',
+        Class        => 'Modernize FormUpdate',
         Translation  => 0,
         Name         => 'NewUserID',
         PossibleNone => 1,
@@ -3592,7 +3592,7 @@ sub _MaskEmailNew {
             Data       => $Param{ResponsibleUsers},
             SelectedID => $Param{ResponsibleUserSelected},
             Name       => 'NewResponsibleID',
-            Class      => 'Modernize',
+            Class      => 'Modernize FormUpdate',
         );
         $LayoutObject->Block(
             Name => 'ResponsibleSelection',
diff --git a/Kernel/Modules/CustomerTicketMessage.pm b/Kernel/Modules/CustomerTicketMessage.pm
index 06f42f308b..66c8123b9a 100644
--- a/Kernel/Modules/CustomerTicketMessage.pm
+++ b/Kernel/Modules/CustomerTicketMessage.pm
@@ -1791,7 +1791,7 @@ sub _MaskNew {
             PossibleNone => 1,
             Sort         => 'AlphanumericValue',
             Translation  => 1,
-            Class        => "Validate_Required Modernize " . ( $Param{Errors}->{TypeIDInvalid} || '' ),
+            Class        => "Validate_Required Modernize FormUpdate " . ( $Param{Errors}->{TypeIDInvalid} || '' ),
         );
         $LayoutObject->Block(
             Name => 'TicketType',