diff --git a/doc/conf.py b/doc/conf.py
index 1c3d31d..aca51b6 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -67,7 +67,8 @@ release = '0.1.0'
 exclude_patterns = ['_build']
 
 # The reST default role (used for this markup: `text`) to use for all documents.
-#default_role = None
+default_role = 'c:func'
+primary_domain = 'c'
 
 # If true, '()' will be appended to :func: etc. cross-reference text.
 #add_function_parentheses = True