diff --git a/beets/util/confit.py b/beets/util/confit.py
index 29afd02e7..5f4d862ea 100644
--- a/beets/util/confit.py
+++ b/beets/util/confit.py
@@ -794,7 +794,9 @@ class Configuration(RootView):
         super(Configuration, self).__init__([])
         self.appname = appname
         self.modname = modname
-        # Pre-resolve default source location
+
+        # Resolve default source location. We do this ahead of time to
+        # avoid unexpected problems if the working directory changes.
         self._package_path = _package_path(appname)
 
         self._env_var = '{0}DIR'.format(self.appname.upper())