diff --git a/swift-deploy.yaml b/swift-deploy.yaml
index e3f475c0b8..a7486490e9 100644
--- a/swift-deploy.yaml
+++ b/swift-deploy.yaml
@@ -10,6 +10,10 @@ parameters:
     description: The password for the swift service account, used by the swift proxy services.
     type: string
     hidden: true
+  SwiftPartPower:
+    default: 10
+    description: Partition Power to use when building Swift rings
+    type: number
   SwiftReplicas:
     type: number
     default: 1
@@ -24,6 +28,7 @@ resources:
       input_values:
         swift_hash_suffix: {get_param: SwiftHashSuffix}
         swift_password: {get_param: SwiftPassword}
+        swift_part_power: {get_param: SwiftPartPower}
         swift_devices:
           Fn::Join:
           - ', '
diff --git a/swift-source.yaml b/swift-source.yaml
index 1a5a04f4bc..fcf943611c 100644
--- a/swift-source.yaml
+++ b/swift-source.yaml
@@ -7,7 +7,7 @@ resources:
         swift:
           devices: { get_input: swift_devices }
           hash: { get_input: swift_hash_suffix }
-          part-power: 10
+          part-power: { get_input: swift_part_power }
           proxy-memcache: { get_input: swift_proxy_memcache }
           replicas: {get_input: swift_replicas }
           service-password: { get_input: swift_password }
diff --git a/swift-storage-source.yaml b/swift-storage-source.yaml
index 40e0573b63..49bc3e42c2 100644
--- a/swift-storage-source.yaml
+++ b/swift-storage-source.yaml
@@ -52,6 +52,7 @@ resources:
         neutron_enable_tunneling: {get_param: NeutronEnableTunnelling}
         swift_hash_suffix: {get_param: SwiftHashSuffix}
         swift_password: {get_param: SwiftPassword}
+        swift_part_power: {get_param: SwiftPartPower}
         swift_devices:
           Fn::Join:
           - ', '