diff --git a/beets/metadata_plugins.py b/beets/metadata_plugins.py
index 780fe30b7..7e84167ff 100644
--- a/beets/metadata_plugins.py
+++ b/beets/metadata_plugins.py
@@ -152,7 +152,7 @@ class MetadataSourcePlugin(BeetsPlugin, metaclass=abc.ABCMeta):
         self.config.add(
             {
                 "search_limit": 5,
-                "data_source_mismatch_penalty": 0.5,
+                "data_source_mismatch_penalty": 0.0,
             }
         )
 
diff --git a/docs/plugins/index.rst b/docs/plugins/index.rst
index 52009ed84..1374475cc 100644
--- a/docs/plugins/index.rst
+++ b/docs/plugins/index.rst
@@ -51,7 +51,7 @@ Some plugins provide sources for metadata in addition to MusicBrainz. These
 plugins share the following configuration option:
 
 - **data_source_mismatch_penalty**: Penalty applied to matches during import.
-  Set to 0.0 to disable. Default: ``0.5``.
+  Set to 0.0 to disable. Default: ``0.0``.
 
 For example, to equally consider matches from Discogs and MusicBrainz add the
 following to your configuration: