Puzzle:Escape From A Jail

You are locked in a jail that has two identical gates. One gate leads to freedom and the other gate leads to death. Each gate has got a guard. One guard always says the truth and the other guard always say lies. You are not sure which guard says the truth and which one lies. You are permitted to ask only one question that can make you escape from the jail. What should the question be ?

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Ask any guard - "which door d other guard wil point if i ask abt the door to freedom?"
if the one u ask is truthful - he'llsay tat 'other wil point to door to death' [ coz he is truthful]
if the one u ask is a liar - he'll say tat 'other guard wil point to door to death' [coz he lies]
so any case - either a liar or truthful u'll get to know which one is door to death.. so u can choose the other door which leads to freedom...