1 files changed, 4 insertions, 1 deletions
diff --git a/sphinx/ext/linkcode.py b/sphinx/ext/linkcode.py
index a0b4d0da5..b11fff096 100644
--- a/sphinx/ext/linkcode.py
+++ b/sphinx/ext/linkcode.py
@@ -16,9 +16,11 @@ from sphinx import addnodes
 from sphinx.locale import _
 from sphinx.errors import SphinxError
 
+
 class LinkcodeError(SphinxError):
     category = "linkcode error"
 
+
 def doctree_read(app, doctree):
     env = app.builder.env
 
@@ -68,7 +70,8 @@ def doctree_read(app, doctree):
                                         classes=['viewcode-link'])
             signode += onlynode
 
+
 def setup(app):
     app.connect('doctree-read', doctree_read)
     app.add_config_value('linkcode_resolve', None, '')
-    return {'version': sphinx.__version__}
+    return {'version': sphinx.__version__, 'parallel_read_safe': False}