diff --git a/cluster/kube/lib/rook.libsonnet b/cluster/kube/lib/rook.libsonnet
index 4acf80d..a3cd3d3 100644
--- a/cluster/kube/lib/rook.libsonnet
+++ b/cluster/kube/lib/rook.libsonnet
@@ -585,7 +585,8 @@
                                     NODE_NAME: kube.FieldRef("spec.nodeName"),
                                     POD_NAME: kube.FieldRef("metadata.name"),
                                     POD_NAMESPACE: kube.FieldRef("metadata.namespace"),
-                                    ROOK_CSI_KUBELET_DIR_PATH: "/var/lib/kubernetes"
+                                    ROOK_CSI_KUBELET_DIR_PATH: "/var/lib/kubernetes",
+                                    ROOK_ENABLE_FLEX_DRIVER: "true",
                                 },
                             },
                         },