STC rejects concatenated string as annotation parameter

@CompileStatic
class Example {
  public static final String ASDF = 'asdf'

  @Grab(ASDF + ':asdf:123')
  // @CompileDynamic
  void foo() {}
}

This produces the familiar Attribute 'value' should have type 'java.lang.String'; but found type 'java.lang.Object' in @groovy.lang.Grab on the annotation value, but applying @CompileDynamic to the method declaration (alongside the non-working annotation!) fixes it.