UK State Pension

[Jewelwing]

I know this has been asked before, so I apologise for the repetition but the correct answer is not entirely clear to me.

I am a US citizen living in the UK, where I was born. I receive a UK State pension (that's the UK equivalent of social security). I have never worked as a Government employee. Does it need to be declared on my US tax return? I am having trouble trying to interpret the double taxation treaty, especially as it relates to the so-called "savings clause" in respect of public pensions. Thanks in advance.