"Poland has a major interest in preventing any British EU exit. We are ready to support British demands as regards changes to their treaty obligations and possibly also changes to the European Union`s treaty architecture," Szymanski told reporters.
"We want Britain to stay in the EU... The EU`s strength comes first and foremost from its scale. It would make a bad precedent to create a smaller union. That would mean the weakening of Europe`s position."
But Poland could not accept Cameron`s call to allow Britain to withhold benefits from workers from other EU states for up to four years as this would affect the hundreds of thousands of Poles living and working in Britain.
"The only matter of absolute principle (for Poland) is differentiating between people within the EU based on their passport," Szymanski said, adding that would violate the principle on non-discrimination.
Poland, one of the former communist states in central-eastern Europe, has been one of the main beneficiaries of the freedom of movement since its accession in 2004.
Poland`s newly-installed Prime Minister Beata Szydlo said she expected Cameron to visit Poland soon. Her conservative government sympathizes with the British criticism of the EU and shares London`s opposition to an ever-deeper integration.
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