There is a trick here. In most card rooms, and all rooms that use TDA or WSOP
rules this is just a call.
For TDA see rule 46. "When facing a bet (or a raise), a multiple chip bet is a call if every chip is needed to make the call...i.e. removal of just one of the smallest chips leaves less than the call amount."
This is one of those sneaky rules that not many know. And I have to keep reminding my dealers of this rule because they forget, or dont even see that it has come into play.
It is a rare case as this particular situation does not come up very often.