diff --git a/src/type_check_visitor.cpp b/src/type_check_visitor.cpp
index d1e9b3c..1c909e9 100644
--- a/src/type_check_visitor.cpp
+++ b/src/type_check_visitor.cpp
@@ -254,7 +254,6 @@ void TypeCheckVisitor::Visit(FunctionDefinitionStatement* node) {
 void TypeCheckVisitor::Visit(TypeDefinitionStatement* node) {
   is_in_statement_ = true;
 
-  // TODO: defined functions can be not redifined
   std::unordered_map<std::string, info::TypeclassGraph::FunctionInfo*> required_functions =
     global_info_.GetAnnotatedTypeFunctionsMap(node->definition->type.get());