Error in pinyin for 数 example sentence

In the PLC dictionary definition for 数, Verb 1, the third example sentence is 扳着手指头数. The pinyin is given as pan1 zhuo2shou3 zhi3toushu3, but I suspect it should be ban1zhe shou3zhi3tou shu3.

Yeah, I know it's not a major issue, but I have a four year old learning maths, and this is the kind of Chinese we use!