diff --git a/sphinx/ext/linkcode.py b/sphinx/ext/linkcode.py
index ffe5b9c09..be834001f 100644
--- a/sphinx/ext/linkcode.py
+++ b/sphinx/ext/linkcode.py
@@ -69,4 +69,4 @@ def doctree_read(app, doctree):
 
 def setup(app):
     app.connect('doctree-read', doctree_read)
-    app.add_config_value('linkcode_resolve', None, 'env')
+    app.add_config_value('linkcode_resolve', None, '')