Wawrinka was to have played in Rotterdam 12 months ago, but injury kept him away.
Now, the 29-year-old, has come good on his vow to shake up his scheduling.
"I haven't played indoors in February for 10 years," said Wawrinka.
"I used to play in South America and the last few years I haven't played in February,
"I'm excited to be back. I feel good. It's important for me to come to play here. It’s a great tournament, a good indoor court.