diff --git a/src/main/java/com/algorand/algosdk/v2/client/model/SimulateRequest.java b/src/main/java/com/algorand/algosdk/v2/client/model/SimulateRequest.java
index 9dd56f67b..f098aebd3 100644
--- a/src/main/java/com/algorand/algosdk/v2/client/model/SimulateRequest.java
+++ b/src/main/java/com/algorand/algosdk/v2/client/model/SimulateRequest.java
@@ -43,6 +43,13 @@ public class SimulateRequest extends PathResponse {
     @JsonProperty("extra-opcode-budget")
     public Long extraOpcodeBudget;
 
+    /**
+     * If true, signers for transactions that are missing signatures will be fixed
+     * during evaluation.
+     */
+    @JsonProperty("fix-signers")
+    public Boolean fixSigners;
+
     /**
      * If provided, specifies the round preceding the simulation. State changes through
      * this round will be used to run this simulation. Usually only the 4 most recent
@@ -70,6 +77,7 @@ public boolean equals(Object o) {
         if (!Objects.deepEquals(this.allowUnnamedResources, other.allowUnnamedResources)) return false;
         if (!Objects.deepEquals(this.execTraceConfig, other.execTraceConfig)) return false;
         if (!Objects.deepEquals(this.extraOpcodeBudget, other.extraOpcodeBudget)) return false;
+        if (!Objects.deepEquals(this.fixSigners, other.fixSigners)) return false;
         if (!Objects.deepEquals(this.round, other.round)) return false;
         if (!Objects.deepEquals(this.txnGroups, other.txnGroups)) return false;
 
diff --git a/src/main/java/com/algorand/algosdk/v2/client/model/SimulateTransactionResult.java b/src/main/java/com/algorand/algosdk/v2/client/model/SimulateTransactionResult.java
index 921f018b2..ac906ba17 100644
--- a/src/main/java/com/algorand/algosdk/v2/client/model/SimulateTransactionResult.java
+++ b/src/main/java/com/algorand/algosdk/v2/client/model/SimulateTransactionResult.java
@@ -1,7 +1,9 @@
 package com.algorand.algosdk.v2.client.model;
 
+import java.security.NoSuchAlgorithmException;
 import java.util.Objects;
 
+import com.algorand.algosdk.crypto.Address;
 import com.algorand.algosdk.v2.client.common.PathResponse;
 import com.fasterxml.jackson.annotation.JsonProperty;
 
@@ -24,6 +26,24 @@ public class SimulateTransactionResult extends PathResponse {
     @JsonProperty("exec-trace")
     public SimulationTransactionExecTrace execTrace;
 
+    /**
+     * The account that needed to sign this transaction when no signature was provided
+     * and the provided signer was incorrect.
+     */
+    @JsonProperty("fixed-signer")
+    public void fixedSigner(String fixedSigner) throws NoSuchAlgorithmException {
+        this.fixedSigner = new Address(fixedSigner);
+    }
+    @JsonProperty("fixed-signer")
+    public String fixedSigner() throws NoSuchAlgorithmException {
+        if (this.fixedSigner != null) {
+            return this.fixedSigner.encodeAsString();
+        } else {
+            return null;
+        }
+    }
+    public Address fixedSigner;
+
     /**
      * Budget used during execution of a logic sig transaction.
      */
@@ -60,6 +80,7 @@ public boolean equals(Object o) {
         SimulateTransactionResult other = (SimulateTransactionResult) o;
         if (!Objects.deepEquals(this.appBudgetConsumed, other.appBudgetConsumed)) return false;
         if (!Objects.deepEquals(this.execTrace, other.execTrace)) return false;
+        if (!Objects.deepEquals(this.fixedSigner, other.fixedSigner)) return false;
         if (!Objects.deepEquals(this.logicSigBudgetConsumed, other.logicSigBudgetConsumed)) return false;
         if (!Objects.deepEquals(this.txnResult, other.txnResult)) return false;
         if (!Objects.deepEquals(this.unnamedResourcesAccessed, other.unnamedResourcesAccessed)) return false;
diff --git a/src/main/java/com/algorand/algosdk/v2/client/model/SimulationEvalOverrides.java b/src/main/java/com/algorand/algosdk/v2/client/model/SimulationEvalOverrides.java
index aa5b03251..2ef5fca42 100644
--- a/src/main/java/com/algorand/algosdk/v2/client/model/SimulationEvalOverrides.java
+++ b/src/main/java/com/algorand/algosdk/v2/client/model/SimulationEvalOverrides.java
@@ -31,6 +31,13 @@ public class SimulationEvalOverrides extends PathResponse {
     @JsonProperty("extra-opcode-budget")
     public Long extraOpcodeBudget;
 
+    /**
+     * If true, signers for transactions that are missing signatures will be fixed
+     * during evaluation.
+     */
+    @JsonProperty("fix-signers")
+    public Boolean fixSigners;
+
     /**
      * The maximum log calls one can make during simulation
      */
@@ -53,6 +60,7 @@ public boolean equals(Object o) {
         if (!Objects.deepEquals(this.allowEmptySignatures, other.allowEmptySignatures)) return false;
         if (!Objects.deepEquals(this.allowUnnamedResources, other.allowUnnamedResources)) return false;
         if (!Objects.deepEquals(this.extraOpcodeBudget, other.extraOpcodeBudget)) return false;
+        if (!Objects.deepEquals(this.fixSigners, other.fixSigners)) return false;
         if (!Objects.deepEquals(this.maxLogCalls, other.maxLogCalls)) return false;
         if (!Objects.deepEquals(this.maxLogSize, other.maxLogSize)) return false;