diff --git a/contracts/drafts/ERC20Snapshot.sol b/contracts/drafts/ERC20Snapshot.sol
index 685de1ec0..6209b81c5 100644
--- a/contracts/drafts/ERC20Snapshot.sol
+++ b/contracts/drafts/ERC20Snapshot.sol
@@ -137,4 +137,6 @@ contract ERC20Snapshot is Initializable, ERC20 {
             return ids[ids.length - 1];
         }
     }
+
+    uint256[50] private ______gap;
 }