Flow: Did you forget to declare type parameter `DefaultProps` of identifier `Component`

[ericls]

Whenever I use

MyComponent.defaultProps = {
    ...something
}

after MyComponent is created by

class MyComponent extends Component {
    ...
}

flow gives the error:

object literal. This type is incompatible with undefined
Did you forget to declare type parameter `DefaultProps` of identifier `Component`

[TimSusa]

This is a bug I would say... suffering the same here at the moment

[nmn]

This is type error. Flow has already inferred the type for your class before you try to mutate the defaultProps property.

And since you didn't give it a type it was inferred as void.

class MyComponent extends Component {
    static defaultProps: Object;
}

This should fix it.