1 files changed, 6 insertions, 6 deletions
diff --git a/sphinx/ext/linkcode.py b/sphinx/ext/linkcode.py
index af45f32fa..6e16a1ac5 100644
--- a/sphinx/ext/linkcode.py
+++ b/sphinx/ext/linkcode.py
@@ -35,12 +35,12 @@ def doctree_read(app, doctree):
         raise LinkcodeError(
             "Function `linkcode_resolve` is not given in conf.py")
 
-    domain_keys = dict(
-        py=['module', 'fullname'],
-        c=['names'],
-        cpp=['names'],
-        js=['object', 'fullname'],
-    )
+    domain_keys = {
+        'py': ['module', 'fullname'],
+        'c': ['names'],
+        'cpp': ['names'],
+        'js': ['object', 'fullname'],
+    }
 
     for objnode in doctree.traverse(addnodes.desc):
         domain = objnode.get('domain')