How to overcome saying the word "order"?

How to overcome saying the word "order"? I work at a fast food chain, I am perfectly fine talking face to face with customers, but when its through the microphone for drive through \- I stutter. I only stutter on the word "order". I need to say "Hi please place your order when you're ready". I can say everything else but order, I take a short \(short enough break to make it awkward\) break between "your" and "order". Its unusual since I have been at this fast food chain for 3 years, and its only just started happening to me, I don't know why. I have tried singing in the car before work, breaking up the word, but it doesn't work. Any ideas? I am desperate!