Warsaw: The agreement with the US on the deployment of a missile defence system on its territory was "a mistake", Polish President Bronislaw Komorowski said.
The agreement was "a political mistake" and it should not be repeated, RIA Novosti quoted Komorowski as saying.
The US had scrapped plans to deploy an anti-ballistic-missile defence shield in the Czech Republic and Poland in September 2010.
"Our mistake was that while accepting the US proposal, we have not taken into account a political risk related to the change of the US President. We have paid a too high political price for that," Komorowski said.
Poland needs its own anti-missile shield and it must be a part of the existing European missile defence system, he said in an interview with Wprost magazine published on Saturday.
"We must have this element of the Polish defence (missile defence system). Spending large sums on military hardware is actually meaningless if it is not secured from… the missile attack and air raids," he added.