diff --git a/config/sphinx-build/conf.py b/config/sphinx-build/conf.py
index 6f3d5a9f..b56448fa 100644
--- a/config/sphinx-build/conf.py
+++ b/config/sphinx-build/conf.py
@@ -86,8 +86,8 @@ pygments_style = 'sphinx'
 # A list of ignored prefixes for module index sorting.
 #modindex_common_prefix = []
 
-extlinks = {'jirabug': ('https://jira.percona.com/browse/%s', ''),
-'lpbug': ('https://bugs.launchpad.net/percona-toolkit/+bug/%s', '#')}
+extlinks = {'jirabug': ('https://jira.percona.com/browse/%s', '%s'),
+'lpbug': ('https://bugs.launchpad.net/percona-toolkit/+bug/%s', '#%s')}
 # -- Options for HTML output ---------------------------------------------------
 
 # The theme to use for HTML and HTML Help pages.  See the documentation for