diff --git a/docs/reference.rst b/docs/reference.rst
index a7d6268..46aeaf9 100644
--- a/docs/reference.rst
+++ b/docs/reference.rst
@@ -5,4 +5,5 @@ Reference
 
 .. automodule:: distogram
     :members: Distogram, update, merge, count_at, count, bounds, mean,
-              variance, stddev, histogram, quantile
+              variance, stddev, histogram, frequency_density_distribution,
+              quantile