Supress the compiler warning about reflectiveCalls

When I try to access the DB.INSTALL namespace it gives me 

    [warn] ...DatomicMigrate.scala:34: reflective access of structural type member value INSTALL should be   enabled
    [warn] by making the implicit value scala.language.reflectiveCalls visible.
    [warn] This can be achieved by adding the import clause 'import scala.language.reflectiveCalls'
    [warn] or by setting the compiler option -language:reflectiveCalls.
    [warn] See the Scala docs for value scala.language.reflectiveCalls for a discussion
    [warn] why the feature should be explicitly enabled.
    [warn]     db.datoms(Database.AVET, Namespace.DB.INSTALL / "attribute").foreach { datomic =>
    [warn]                                           ^