diff --git a/contracts/vault/Accounts.sol b/contracts/vault/Accounts.sol
index 3066e7d..c4db427 100644
--- a/contracts/vault/Accounts.sol
+++ b/contracts/vault/Accounts.sol
@@ -69,7 +69,7 @@ library Accounts {
   ) internal pure returns (bool) {
     Duration duration = account.flow.updated.until(timestamp);
     uint128 outgoing = account.flow.outgoing.accumulate(duration);
-    return outgoing <= account.balance.available;
+    return outgoing < account.balance.available;
   }
 
   /// Updates the available and designated balances by accumulating the