diff --git a/Cargo.lock b/Cargo.lock
index 13fbcf9ef..fe4926175 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -611,6 +611,7 @@ dependencies = [
  "ethcore-ipc-nano 1.4.0",
  "ethcore-network 1.4.0",
  "ethcore-util 1.4.0",
+ "ethkey 0.2.0",
  "heapsize 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "parking_lot 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
diff --git a/sync/Cargo.toml b/sync/Cargo.toml
index a73077c9c..a6bdf8c8f 100644
--- a/sync/Cargo.toml
+++ b/sync/Cargo.toml
@@ -13,6 +13,7 @@ ethcore-ipc-codegen = { path = "../ipc/codegen" }
 
 [dependencies]
 ethcore-util = { path = "../util" }
+ethkey = { path = "../ethkey" }
 ethcore-network = { path = "../util/network" }
 ethcore-io = { path = "../util/io" }
 ethcore = { path = "../ethcore" }
diff --git a/sync/src/lib.rs b/sync/src/lib.rs
index d2c6e2583..81f2e7b9d 100644
--- a/sync/src/lib.rs
+++ b/sync/src/lib.rs
@@ -37,6 +37,9 @@ extern crate semver;
 extern crate parking_lot;
 extern crate rlp;
 
+#[cfg(test)]
+extern crate ethkey;
+
 #[macro_use]
 extern crate log;
 #[macro_use]