diff --git a/lib/keystone b/lib/keystone
index b2dfa83..fd92f31 100644
--- a/lib/keystone
+++ b/lib/keystone
@@ -88,7 +88,7 @@
 
 # Select Keystone's token provider (and format)
 # Choose from 'uuid', 'pki', 'pkiz', or 'fernet'
-KEYSTONE_TOKEN_FORMAT=${KEYSTONE_TOKEN_FORMAT:-}
+KEYSTONE_TOKEN_FORMAT=${KEYSTONE_TOKEN_FORMAT:-fernet}
 KEYSTONE_TOKEN_FORMAT=$(echo ${KEYSTONE_TOKEN_FORMAT} | tr '[:upper:]' '[:lower:]')
 
 # Set Keystone interface configuration