Brakeman is reporting unsafe model attribute when using suggested impersonate method

[PrintsCharming]

I love this gem.

When using link_to("Impersonate User", impersonate_engine.impersonate_user_path(user)) Brakeman is reporting:

Unsafe model attribute in link_to href near line 24: link_to("Impersonate User", impersonate_engine.impersonate_user_path(user))

Is this a byproduct of the route being in the mountable engine?

Rails 3.2.13