diff --git a/docs/aggregates.rst b/docs/aggregates.rst
index 5d262ff..8404094 100644
--- a/docs/aggregates.rst
+++ b/docs/aggregates.rst
@@ -1,6 +1,8 @@
 Aggregated attributes
 =====================
 
+API
+---
 .. automodule:: sqlalchemy_utils.aggregates
 
 .. autofunction:: aggregated