diff --git a/docs/source/pythonapi/base.rst b/docs/source/pythonapi/base.rst
index b9eb7033f..752cf417e 100644
--- a/docs/source/pythonapi/base.rst
+++ b/docs/source/pythonapi/base.rst
@@ -122,6 +122,7 @@ Constructing Tallies
    openmc.SpatialLegendreFilter
    openmc.SphericalHarmonicsFilter
    openmc.ZernikeFilter
+   openmc.ZernikeRadialFilter
    openmc.ParticleFilter
    openmc.Mesh
    openmc.Trigger