diff --git a/contracts/src/instances/steth/StETHTarget0.sol b/contracts/src/instances/steth/StETHTarget0.sol
index 9429c7a2f..447b45bdd 100644
--- a/contracts/src/instances/steth/StETHTarget0.sol
+++ b/contracts/src/instances/steth/StETHTarget0.sol
@@ -22,11 +22,11 @@ contract StETHTarget0 is HyperdriveTarget0, StETHBase {
 
     /// @notice Initializes the target0 contract.
     /// @param _config The configuration of the Hyperdrive pool.
-    /// @param _lido The Lido contract.
+    /// @param __lido The Lido contract.
     constructor(
         IHyperdrive.PoolConfig memory _config,
-        ILido _lido
-    ) HyperdriveTarget0(_config) StETHBase(_lido) {}
+        ILido __lido
+    ) HyperdriveTarget0(_config) StETHBase(__lido) {}
 
     /// Extras ///
 
diff --git a/contracts/src/instances/steth/StETHTarget1.sol b/contracts/src/instances/steth/StETHTarget1.sol
index f1f3ff8c1..7a3a36428 100644
--- a/contracts/src/instances/steth/StETHTarget1.sol
+++ b/contracts/src/instances/steth/StETHTarget1.sol
@@ -15,9 +15,9 @@ import { StETHBase } from "./StETHBase.sol";
 contract StETHTarget1 is HyperdriveTarget1, StETHBase {
     /// @notice Initializes the target1 contract.
     /// @param _config The configuration of the Hyperdrive pool.
-    /// @param _lido The Lido contract.
+    /// @param __lido The Lido contract.
     constructor(
         IHyperdrive.PoolConfig memory _config,
-        ILido _lido
-    ) HyperdriveTarget1(_config) StETHBase(_lido) {}
+        ILido __lido
+    ) HyperdriveTarget1(_config) StETHBase(__lido) {}
 }
diff --git a/contracts/src/instances/steth/StETHTarget2.sol b/contracts/src/instances/steth/StETHTarget2.sol
index e11a4fb81..570671133 100644
--- a/contracts/src/instances/steth/StETHTarget2.sol
+++ b/contracts/src/instances/steth/StETHTarget2.sol
@@ -15,9 +15,9 @@ import { StETHBase } from "./StETHBase.sol";
 contract StETHTarget2 is HyperdriveTarget2, StETHBase {
     /// @notice Initializes the target2 contract.
     /// @param _config The configuration of the Hyperdrive pool.
-    /// @param _lido The Lido contract.
+    /// @param __lido The Lido contract.
     constructor(
         IHyperdrive.PoolConfig memory _config,
-        ILido _lido
-    ) HyperdriveTarget2(_config) StETHBase(_lido) {}
+        ILido __lido
+    ) HyperdriveTarget2(_config) StETHBase(__lido) {}
 }
diff --git a/contracts/src/instances/steth/StETHTarget3.sol b/contracts/src/instances/steth/StETHTarget3.sol
index 6abf7c590..e78555c89 100644
--- a/contracts/src/instances/steth/StETHTarget3.sol
+++ b/contracts/src/instances/steth/StETHTarget3.sol
@@ -15,9 +15,9 @@ import { StETHBase } from "./StETHBase.sol";
 contract StETHTarget3 is HyperdriveTarget3, StETHBase {
     /// @notice Initializes the target3 contract.
     /// @param _config The configuration of the Hyperdrive pool.
-    /// @param _lido The Lido contract.
+    /// @param __lido The Lido contract.
     constructor(
         IHyperdrive.PoolConfig memory _config,
-        ILido _lido
-    ) HyperdriveTarget3(_config) StETHBase(_lido) {}
+        ILido __lido
+    ) HyperdriveTarget3(_config) StETHBase(__lido) {}
 }
diff --git a/contracts/src/instances/steth/StETHTarget4.sol b/contracts/src/instances/steth/StETHTarget4.sol
index 63f605aa2..03e15f9d8 100644
--- a/contracts/src/instances/steth/StETHTarget4.sol
+++ b/contracts/src/instances/steth/StETHTarget4.sol
@@ -15,9 +15,9 @@ import { StETHBase } from "./StETHBase.sol";
 contract StETHTarget4 is HyperdriveTarget4, StETHBase {
     /// @notice Initializes the target4 contract.
     /// @param _config The configuration of the Hyperdrive pool.
-    /// @param _lido The Lido contract.
+    /// @param __lido The Lido contract.
     constructor(
         IHyperdrive.PoolConfig memory _config,
-        ILido _lido
-    ) HyperdriveTarget4(_config) StETHBase(_lido) {}
+        ILido __lido
+    ) HyperdriveTarget4(_config) StETHBase(__lido) {}
 }
diff --git a/contracts/src/interfaces/IHyperdrive.sol b/contracts/src/interfaces/IHyperdrive.sol
index df84bf8fa..63099def0 100644
--- a/contracts/src/interfaces/IHyperdrive.sol
+++ b/contracts/src/interfaces/IHyperdrive.sol
@@ -239,6 +239,9 @@ interface IHyperdrive is
     ///         price of the underlying yield source on deployment.
     error InvalidInitialVaultSharePrice();
 
+    /// @notice Thrown when the present value calculation fails.
+    error InvalidPresentValue();
+
     /// @notice Thrown when update liquidity brings the share reserves below
     ///         the minimum share reserves.
     error InvalidShareReserves();
@@ -266,10 +269,6 @@ interface IHyperdrive is
     ///         LPs from losses of precision that can occur at small scales.
     error MinimumTransactionAmount();
 
-    /// @notice Thrown when the present value is negative. Whatever proceeded
-    ///         a negative present value should be reverted.
-    error NegativePresentValue();
-
     /// @notice Thrown when the present value prior to adding liquidity results in a
     ///         decrease in present value after liquidity. This is caused by a
     ///         shortage in liquidity that prevents all the open positions being
diff --git a/contracts/src/libraries/LPMath.sol b/contracts/src/libraries/LPMath.sol
index d8453418c..dfeeffc4d 100644
--- a/contracts/src/libraries/LPMath.sol
+++ b/contracts/src/libraries/LPMath.sol
@@ -144,7 +144,7 @@ library LPMath {
             _params
         );
         if (!success) {
-            revert IHyperdrive.NegativePresentValue();
+            revert IHyperdrive.InvalidPresentValue();
         }
         return presentValue;
     }