diff --git a/src/end.sol b/src/end.sol
index 14e17b19..3c312480 100644
--- a/src/end.sol
+++ b/src/end.sol
@@ -418,9 +418,8 @@ contract End {
     function thaw() external {
         require(live == 0, "End/still-live");
         require(debt == 0, "End/debt-not-zero");
-        require(vat.dai(address(vow)) == 0, "End/surplus-not-zero");
         require(block.timestamp >= add(when, wait), "End/wait-not-finished");
-        debt = sub(vat.debt(), cure.tell());
+        debt = sub(vat.debt(), add(vat.dai(address(vow)), cure.tell()));
         emit Thaw();
     }
     function flow(bytes32 ilk) external {