1-chloro-3-methylcyclobutane - IUPAC name

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Homework Statement

Name this molecule

Homework Equations

Naming cycloalkanes:

1) The functional groups should receive the lowest carbon number.
2) Any substituents are then assigned carbon numbers.

The Attempt at a Solution

Following the above two rules, shouldn't the molecule therefore be named 1-methyl-3-chlorocyclobutane?

The key however says 1-chloro-3-methylcyclobutane. Please advise.

 

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Oops. Realized that halide substituents are treated the same as functional groups.