Cross-voice arpeggio moves accidental away from notehead

[Nick Payne]

See example below. The chord across two voices has the accidental next 
to the notehead. Add an arpeggio and the accidental and arpeggio both 
get spaced away to the left. How do I move the accidental back next to 
the notehead?

\version "2.17.15"

\new Staff <<
  \set Staff.connectArpeggios = ##t
  \new Voice = "1" { \voiceOne \relative c'' { <e a,>2 s <e 
a,>\arpeggio } }
  \new Voice = "2" { \voiceTwo \relative c'' { <g cis,>2 s <g 
cis,>\arpeggio } }
>>

\layout {
  \context {
    \Staff \consists "Span_arpeggio_engraver"
  }
}

arpeggio.png
Description: PNG image