"It is really outrageous (not to include Nalanda university in the UNESCO heritage list," Sen, who is chancellor of the varsity, told reporters.
He urged the world body to "mend its mistake" and include the historic university in its list of heritage sites.
The International Advisory panel headed by former Singapore External Affairs minister George Iyo of the university is also working on this, he said after a meeting of governing board of the university.
The noble laureate said the central government should also work to help the university get UNESCO heritage list.
Member of the university's international advisory panel and MP, N K Singh "this is injustice with the Nalanda university".
The union government should take effective steps for this, he said pointing out that senior Congress leader Karan Singh is a representative of the UNESCO.
The prestigious university, to be headquartered at Nalanda, will start academic activities from September/October 2014 in two subjects - Historical Studies and Environmental Studies, Sen had said earlier in the day.