From 6bd5755f51d2b316086d6111fa2f3e141c1bd157 Mon Sep 17 00:00:00 2001
From: Brandon Iles <brandon@fragments.org>
Date: Mon, 2 Mar 2026 15:28:51 -0800
Subject: [PATCH] Avoid div by 0 in compute DR

---
 spot-contracts/contracts/FeePolicy.sol | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/spot-contracts/contracts/FeePolicy.sol b/spot-contracts/contracts/FeePolicy.sol
index 3bb76149..66485201 100644
--- a/spot-contracts/contracts/FeePolicy.sol
+++ b/spot-contracts/contracts/FeePolicy.sol
@@ -314,6 +314,7 @@ contract FeePolicy is IFeePolicy, OwnableUpgradeable {
     /// @inheritdoc IFeePolicy
     function computeDeviationRatio(SystemTVL memory s) public view override returns (uint256) {
         // NOTE: We assume that perp's TVL and vault's TVL values have the same base denomination.
-        return s.vaultTVL.mulDiv(ONE, s.perpTVL).mulDiv(ONE, targetSystemRatio);
+        uint256 perpTVL = (s.perpTVL > 0) ? s.perpTVL : 0x1;
+        return s.vaultTVL.mulDiv(ONE, perpTVL).mulDiv(ONE, targetSystemRatio);
     }
 }