diff --git a/packages/protocol/contracts/layer2/based/Lib1559Math.sol b/packages/protocol/contracts/layer2/based/Lib1559Math.sol
index 44f91ff248..99502d13dd 100644
--- a/packages/protocol/contracts/layer2/based/Lib1559Math.sol
+++ b/packages/protocol/contracts/layer2/based/Lib1559Math.sol
@@ -57,7 +57,7 @@ library Lib1559Math {
 
         uint256 f = FixedPointMathLib.WAD;
         uint256 ratio = f * _newGasTarget / _gasTarget;
-        if (ratio > uint256(type(int256).max)) revert EIP1559_INVALID_PARAMS();
+        if (ratio == 0 || ratio > uint256(type(int256).max)) revert EIP1559_INVALID_PARAMS();
 
         int256 lnRatio = FixedPointMathLib.lnWad(int256(ratio)); // may be negative