installing phonon-gstreamer-bcakend removes libphonon-dev

When installing gstream-phonon-nackend the dev files of libphonon gets removed. This doesn't sound right. It should only remove the phonon-backend-null dummy backend.

sudo apt-get install phonon-backend-gstreamer
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following package was automatically installed and is no longer required:
  phonon
Use 'apt-get autoremove' to remove it.
The following extra packages will be installed:
  phonon
Suggested packages:
  phonon-backend-vlc phonon-backend-xine phonon-backend-mplayer
  gstreamer0.10-plugins-ugly
The following packages will be REMOVED:
  libphonon-dev phonon-backend-null