Fixed typo.

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | ==> **yes** <==
| Deprecations? | no
| Tests pass?   | --
| Fixed tickets | --
| License       | MIT
| Doc PR        | --

This typo was already in 1.3.5, so it's a BC-break. Shall I add a method with the old function name?