diff --git a/ethcore/src/migrations/mod.rs b/ethcore/src/migrations/mod.rs
index 6cc4a13a8..76b10fd19 100644
--- a/ethcore/src/migrations/mod.rs
+++ b/ethcore/src/migrations/mod.rs
@@ -16,6 +16,8 @@
 
 //! Database migrations.
 
+use util::migration::ChangeColumns;
+
 pub mod state;
 pub mod blocks;
 pub mod extras;
@@ -27,5 +29,18 @@ pub use self::v9::Extract;
 mod v10;
 pub use self::v10::ToV10;
 
-mod v11;
-pub use self::v11::TO_V11;
+/// The migration from v10 to v11.
+/// Adds a column for node info.
+pub const TO_V11: ChangeColumns = ChangeColumns {
+	pre_columns: Some(6),
+	post_columns: Some(7),
+	version: 11,
+};
+
+/// The migration from v11 to v12.
+/// Adds a column for light chain storage.
+pub const TO_V12: ChangeColumns = ChangeColumns {
+	pre_columns: Some(7),
+	post_columns: Some(8),
+	version: 12,
+};
diff --git a/ethcore/src/migrations/v11.rs b/ethcore/src/migrations/v11.rs
deleted file mode 100644
index e33de6170..000000000
--- a/ethcore/src/migrations/v11.rs
+++ /dev/null
@@ -1,26 +0,0 @@
-// Copyright 2015-2017 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
-
-//! Adds a seventh column for node information.
-
-use util::migration::ChangeColumns;
-
-/// The migration from v10 to v11.
-pub const TO_V11: ChangeColumns = ChangeColumns {
-	pre_columns: Some(6),
-	post_columns: Some(7),
-	version: 11,
-};