diff --git a/docs/source/topology.rst b/docs/source/topology.rst
index e1934d37..49ed7be0 100644
--- a/docs/source/topology.rst
+++ b/docs/source/topology.rst
@@ -227,7 +227,7 @@ reference to the particular physical node. The ``BaremetalNode`` definition will
 reference a ``HostProfile`` and can then extend or override any of the
 configuration values.
 
-NOTE: Drydock does not support hostnames containing '__' (double underscoe)
+NOTE: Drydock does not support hostnames containing '__' (double underscore)
 
 Hardware Profile
 ----------------