diff --git a/docs/packstack.rst b/docs/packstack.rst
index 96f878ceb..8c49158f0 100644
--- a/docs/packstack.rst
+++ b/docs/packstack.rst
@@ -163,7 +163,7 @@ Cinder Config parameters
     The password to use for the Cinder to authenticate with Keystone.
 
 **CONFIG_CINDER_BACKEND**
-    The Cinder backend to use ['lvm', 'gluster', 'nfs'].
+    The Cinder backend to use ['lvm', 'gluster', 'nfs', 'vmdk'].
 
 Cinder volume create Config parameters
 --------------------------------------
diff --git a/packstack/plugins/cinder_250.py b/packstack/plugins/cinder_250.py
index 6f5532ccd..ad37ccc3b 100644
--- a/packstack/plugins/cinder_250.py
+++ b/packstack/plugins/cinder_250.py
@@ -65,7 +65,7 @@ def initConfig(controller):
          "USAGE": ("The Cinder backend to use, valid options are: lvm, "
                    "gluster, nfs"),
          "PROMPT": "Enter the Cinder backend to be configured",
-         "OPTION_LIST": ["lvm", "gluster", "nfs"],
+         "OPTION_LIST": ["lvm", "gluster", "nfs", "vmdk"],
          "VALIDATORS": [validators.validate_options],
          "DEFAULT_VALUE": "lvm",
          "MASK_INPUT": False,