diff --git a/beetsplug/replaygain.py b/beetsplug/replaygain.py
index babb469ad..9e5bff4e0 100644
--- a/beetsplug/replaygain.py
+++ b/beetsplug/replaygain.py
@@ -743,7 +743,7 @@ class AudioToolsBackend(Backend):
 
         # Each call to title_gain on a ReplayGain object returns peak and gain
         # of the track.
-        rg_track_gain, rg_track_peak = rg._title_gain(rg, audiofile)
+        rg_track_gain, rg_track_peak = self._title_gain(rg, audiofile)
 
         self._log.debug(u'ReplayGain for track {0} - {1}: {2:.2f}, {3:.2f}',
                         item.artist, item.title, rg_track_gain, rg_track_peak)
diff --git a/docs/changelog.rst b/docs/changelog.rst
index 99ed6d99b..0bde4470e 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -64,6 +64,8 @@ Fixes:
   disabled this time.
 * :doc:`/plugins/lastimport`: The plugin now works with the beets api key by
   default. This can be overridden in the plugin config.
+* :doc:`/plugins/replaygain`: Fix a crash using the Python Audio Tools
+  backend. :bug:`1873`
 
 .. _beets.io: http://beets.io/
 .. _Beetbox: https://github.com/beetbox