diff --git a/contracts/ownership/Claimable.sol b/contracts/ownership/Claimable.sol
index 321b9aa68..299f2c8aa 100644
--- a/contracts/ownership/Claimable.sol
+++ b/contracts/ownership/Claimable.sol
@@ -34,6 +34,6 @@ contract Claimable is Ownable {
   function claimOwnership() onlyPendingOwner public {
     OwnershipTransferred(owner, pendingOwner);
     owner = pendingOwner;
-    pendingOwner = 0x0;
+    pendingOwner = address(0);
   }
 }