diff --git a/plasma_cash/root_chain/contracts/Libraries/RLP.sol b/plasma_cash/root_chain/contracts/Libraries/RLP.sol
index cdf5b71..91273ac 100644
--- a/plasma_cash/root_chain/contracts/Libraries/RLP.sol
+++ b/plasma_cash/root_chain/contracts/Libraries/RLP.sol
@@ -129,10 +129,8 @@ library RLP {
         uint rStartPos;
         uint len;
         (rStartPos, len) = _decode(self);
-        require(len == 20);
-        assembly {
-            data := div(mload(rStartPos), exp(256, 12))
-        }
+        require(len <= 20);
+	return address(toUint(self));
     }
 
     /// @dev Return the RLP encoded bytes.