diff --git a/l2geth/contracts/checkpointoracle/contract/oracle.sol b/l2geth/contracts/checkpointoracle/contract/oracle.sol
index ae567b42f..a58f8abc7 100644
--- a/l2geth/contracts/checkpointoracle/contract/oracle.sol
+++ b/l2geth/contracts/checkpointoracle/contract/oracle.sol
@@ -18,7 +18,7 @@ contract CheckpointOracle {
     */
     constructor(address[] memory _adminlist, uint _sectionSize, uint _processConfirms, uint _threshold) public {
         for (uint i = 0; i < _adminlist.length; i++) {
-            require(_adminlist[i] != address(0),"admin list cant contains 0 address");
+            require(_adminlist[i] != address(0),"admin list can't contain 0 address");
             admins[_adminlist[i]] = true;
             adminList.push(_adminlist[i]);
         }