diff --git a/jobs/rep/spec b/jobs/rep/spec
index 0737d9d1a3..fce7d7a307 100644
--- a/jobs/rep/spec
+++ b/jobs/rep/spec
@@ -53,6 +53,9 @@ properties:
     default: false
   diego.rep.preloaded_rootfses:
     description: "Array of name:absolute_path pairs representing root filesystems preloaded onto the underlying garden"
+  diego.rep.sidecar_rootfs_path:
+    description: "absolute_path representing the root filesystem used for sidecar processes (ie. "/var/vcap/packages/cflinuxfs4/rootfs.tar"). Must be one of the preloaded_rootfses paths. Leaving the default empty string is ok, as it will then select the first of he preloaded_rootfses"
+    default: ""
   diego.rep.rootfs_providers:
     description: "Array of schemes for which the underlying garden can support arbitrary root filesystems"
     default:
diff --git a/jobs/rep/templates/rep.json.erb b/jobs/rep/templates/rep.json.erb
index 1cf981d081..3458ab02fb 100644
--- a/jobs/rep/templates/rep.json.erb
+++ b/jobs/rep/templates/rep.json.erb
@@ -94,6 +94,7 @@
     placement_tags: p("diego.rep.placement_tags"),
     polling_interval: "#{p("diego.rep.polling_interval_in_seconds")}s",
     preloaded_root_fs: p("diego.rep.preloaded_rootfses"),
+    sidecar_root_fs_path: p("diego.rep.sidecar_rootfs_path"),
     read_work_pool_size: p("diego.executor.read_work_pool_size"),
     skip_cert_verify: p("diego.ssl.skip_cert_verify"),
     supported_providers: p("diego.rep.rootfs_providers"),