diff --git a/TreeConverter/TreeConversion/syntax_tree_visitor.cs b/TreeConverter/TreeConversion/syntax_tree_visitor.cs
index 28a1e0d61..f7e9c11aa 100644
--- a/TreeConverter/TreeConversion/syntax_tree_visitor.cs
+++ b/TreeConverter/TreeConversion/syntax_tree_visitor.cs
@@ -18675,7 +18675,10 @@ namespace PascalABCCompiler.TreeConverter
                 if (tn.element_type != null && tn.type_special_kind != SemanticTree.type_special_kind.typed_file) // еще может быть множество set of T - 22.02.16 SSM
                 {
                     elem_type = tn.element_type;
-                    sys_coll_ienum = true;
+
+                    if (tn.type_special_kind == type_special_kind.set_type)
+                        sys_coll_ienum = true;
+
 					return true;
                 }