diff --git a/unyt/unit_object.py b/unyt/unit_object.py
index a6a0de6b..5872b738 100644
--- a/unyt/unit_object.py
+++ b/unyt/unit_object.py
@@ -600,7 +600,7 @@ def list_equivalencies(self):
         --------
         >>> from unyt import km
         >>> km.units.list_equivalencies()
-        spectral: length <-> frequency <-> energy
+        spectral: length <-> spatial_frequency <-> frequency <-> energy
         schwarzschild: mass <-> length
         compton: mass <-> length
         """