diff --git a/trove/instance/service.py b/trove/instance/service.py
index 99f5e1041e..1dd30b3289 100644
--- a/trove/instance/service.py
+++ b/trove/instance/service.py
@@ -472,7 +472,9 @@ class InstanceController(wsgi.Controller):
             self._check_nic(context, nic)
 
         if locality:
-            locality_domain = ['affinity', 'anti-affinity']
+            locality_domain = [
+                'affinity', 'soft-affinity',
+                'anti-affinity', 'soft-anti-affinity']
             locality_domain_msg = ("Invalid locality '%s'. "
                                    "Must be one of ['%s']" %
                                    (locality,