diff --git a/service/files/local_settings.j2 b/service/files/local_settings.j2
index 9e28bdc..e5fff63 100644
--- a/service/files/local_settings.j2
+++ b/service/files/local_settings.j2
@@ -697,7 +697,8 @@ SECURITY_GROUP_RULES = {
 # You should not add settings to this list for out of tree extensions.
 # See: https://wiki.openstack.org/wiki/Horizon/RESTAPI
 REST_API_REQUIRED_SETTINGS = ['OPENSTACK_HYPERVISOR_FEATURES',
-                              'LAUNCH_INSTANCE_DEFAULTS']
+                              'LAUNCH_INSTANCE_DEFAULTS',
+                              'OPENSTACK_IMAGE_FORMATS']
 
 # Additional settings can be made available to the client side for
 # extensibility by specifying them in REST_API_ADDITIONAL_SETTINGS