diff --git a/CodeCompletion/DomSyntaxTreeVisitor.cs b/CodeCompletion/DomSyntaxTreeVisitor.cs
index 6c1ea2f19..23ec0973c 100644
--- a/CodeCompletion/DomSyntaxTreeVisitor.cs
+++ b/CodeCompletion/DomSyntaxTreeVisitor.cs
@@ -1720,6 +1720,8 @@ namespace CodeCompletion
                             key = "auto " + key;
                         else if (cl_def.attribute == class_attribute.Abstract)
                             key = "abstract " + key;
+                        else if (cl_def.attribute == class_attribute.Sealed)
+                            key = "sealed " + key;
                         if (key != null && returned_scope.body_loc != null)
                         {
                             returned_scope.head_loc = new location(returned_scope.body_loc.begin_line_num, returned_scope.body_loc.begin_column_num, returned_scope.body_loc.begin_line_num, returned_scope.body_loc.begin_column_num + key.Length, doc);