Golang nested structs unmarshaling with underscores

I am writing an app using the Instagram API.
I am receiving a JSON request and that gets Unmarshal'ed into nested structs.

// the nested structs
type ResponseData struct {
    ID   string `json:"id"`
    Link string `json:"link"`
    Type string `json:"type"`
    User struct {
	    FullName       string `json:"full_name"`
	    ID             int    `json:"id"`
	    ProfilePicture string `json:"profile_picture"`
	    Username       string `json:"username"`
    }
    Images struct {
	    Standard_Resolution struct {
		    URL string `json:"url"`
	    }
    }
}

For the Image url to be added it needs to have the underscore in Standard_Resolution , I am using Go Plus Package for Atom and I get the lint warning:

> don't use underscores in Go names; struct field Standard_Resolution
> should be StandardResolution

Is there another way for me fix the error and still have the value in my struct.

Update:

I can add an identifier after the last brace for StandardResolution.

StandardResolution struct {
    URL string `json:"url"`
} `json:"standard_resolution"`

Anyway it is easier to read if you don't use nested structs.

type RDUser struct { ... }
type RDStandardResolution struct { ... }
type RDImages struct {
    StandardResolition RDStandardResolution `json:"standard_resolution"`
}
type ResponseData struct {
    ...
    User RDUser `json:"user"`
    Images RDImages `json:"images"`
}