diff --git a/reactive/layer_openstack.py b/reactive/layer_openstack.py
index 65337bb..b638ecd 100644
--- a/reactive/layer_openstack.py
+++ b/reactive/layer_openstack.py
@@ -13,7 +13,7 @@ def default_install():
     The instance automagically becomes the derived OpenStackCharm instance.
     The kv() key charmers.openstack-release-version' is used to cache the
     release being used for this charm.  It is determined by the
-    default_select_release() function below, unless this is overriden by
+    default_select_release() function below, unless this is overridden by
     the charm author
     """
     unitdata.kv().unset(defaults.OPENSTACK_RELEASE_KEY)