diff --git a/doc/reference/index.rst b/doc/reference/index.rst
index 4e58903d..71422b6b 100644
--- a/doc/reference/index.rst
+++ b/doc/reference/index.rst
@@ -1,6 +1,6 @@
-===============
-Reference guide
-===============
+=============
+API reference
+=============
 
 .. automodule:: pygsp