diff --git a/etc/ec2api/ec2api-config-generator.conf b/etc/ec2api/ec2api-config-generator.conf
index d2aa7a68..64934424 100644
--- a/etc/ec2api/ec2api-config-generator.conf
+++ b/etc/ec2api/ec2api-config-generator.conf
@@ -8,5 +8,6 @@ namespace = ec2api.metadata
 namespace = ec2api.s3
 namespace = oslo.log
 namespace = oslo.service.service
+namespace = oslo.cache
 namespace = oslo.db
 namespace = oslo.concurrency