lock against shake to shuffle Nano gen 7

The Gen 7 Nano has a Shake to Shuffle feature that will switch to a random song when the Nano is shaken. Is there a way to lock the Nano to prevent this from occurring? A couple times while at the gym, I've been surprised to have this occur while exercising.

Know that on some prior generations of the Nano you could lock the iPod to prevent this from happening.

Thanks.