cueDuring woes

[N Trocado]

What's wrong with the snippet bellow? It doesn't print the cue notes, unless I 
remove \fluteA and \oboeA.

\version "2.19.55"

fluteA = {
  r1
}

oboeA = {
  r1
}

fluteB = {
  \cueDuring #"oboeB" #DOWN { R1 }
}

oboeB = {
  c4 c c c
}

\addQuote "oboeB" { \oboeB }

\score{
  <<
  \new Staff { \fluteA \fluteB }
  \new Staff { \oboeA \oboeB }
  >>
}