diff --git a/beetsplug/discogs.py b/beetsplug/discogs.py
index 951c5d593..8d7e59ce7 100644
--- a/beetsplug/discogs.py
+++ b/beetsplug/discogs.py
@@ -28,10 +28,6 @@ import time
 
 log = logging.getLogger('beets')
 
-# Distance parameters.
-DISCOGS_SOURCE_WEIGHT = config['discogs']['source_weight'].as_number()
-SOURCE_WEIGHT = config['match']['weight']['source'].as_number()
-
 # Silence spurious INFO log lines generated by urllib3.
 urllib3_logger = logging.getLogger('requests.packages.urllib3')
 urllib3_logger.setLevel(logging.CRITICAL)
@@ -44,7 +40,12 @@ class DiscogsPlugin(BeetsPlugin):
     def album_distance(self, items, album_info, mapping):
         """Returns the discogs source weight and the maximum source weight.
         """
-        return DISCOGS_SOURCE_WEIGHT * SOURCE_WEIGHT, SOURCE_WEIGHT
+        if album_info.data_source == 'Discogs':
+            return config['discogs']['source_weight'].as_number() * \
+                    config['match']['weight']['source'].as_number(), \
+                    config['match']['weight']['source'].as_number()
+        else:
+            return 0.0, 0.0
 
     def candidates(self, items, artist, album, va_likely):
         """Returns a list of AlbumInfo objects for discogs search results