diff --git a/mopidy/core/ext.conf b/mopidy/core/ext.conf
index 94b2ad54..f186adf0 100644
--- a/mopidy/core/ext.conf
+++ b/mopidy/core/ext.conf
@@ -1 +1,3 @@
 [core]
+enabled = true
+max_tracklist_length = 10000
diff --git a/mopidy/core/ext.py b/mopidy/core/ext.py
index 7a610244..9b758119 100644
--- a/mopidy/core/ext.py
+++ b/mopidy/core/ext.py
@@ -18,7 +18,8 @@ class Extension(ext.Extension):
 
     def get_config_schema(self):
         schema = super(Extension, self).get_config_schema()
-        del schema['enabled']  # core cannot be disabled
+        schema['max_tracklist_length'] = config.Integer(
+            minimum=1, maximum=10000)
         return schema
 
     def setup(self, registry):