The 29-year old scored twice on debut for Scotland in the successful Kirin Cup campaign in Japan against Bulgaria back in 2006 but has made just one appearance since - in the same tournament.
"The Japan trip was excellent. It was a great feeling to make my debut and come off the bench to score two goals.
"It was like something you would read in a book.
"I have the shirt from my debut at home and I still have the Kirin Cup medal.
"It was a brilliant feeling to lift a trophy with Scotland, because it doesn't happen often.
"You don't normally need to wait seven years for a second call-up. I was 22 when I made my debut - it's been a long gap.
"It didn't happen for me after Japan, even though I was playing well for my clubs at times.
"But hopefully I can still adapt to international football.
"I was delighted and a bit surprised when I got the email to say I was being considered. I put it on the backburner for a few days but I was happy when I got the call to say I'd been picked."