diff --git a/src/native/managed/cdac/Microsoft.Diagnostics.DataContractReader.Legacy/ClrDataStackWalk.cs b/src/native/managed/cdac/Microsoft.Diagnostics.DataContractReader.Legacy/ClrDataStackWalk.cs
index c9c682d988a8ab..80b1c3e99f43c0 100644
--- a/src/native/managed/cdac/Microsoft.Diagnostics.DataContractReader.Legacy/ClrDataStackWalk.cs
+++ b/src/native/managed/cdac/Microsoft.Diagnostics.DataContractReader.Legacy/ClrDataStackWalk.cs
@@ -15,7 +15,7 @@ namespace Microsoft.Diagnostics.DataContractReader.Legacy;
 public sealed unsafe partial class ClrDataStackWalk : IXCLRDataStackWalk
 {
     private readonly TargetPointer _threadAddr;
-    private readonly uint _flags;
+    private readonly CLRDataStackWalkFlag _flags;
     private readonly Target _target;
     private readonly IXCLRDataStackWalk? _legacyImpl;
     private readonly ThreadData _threadData;
@@ -23,7 +23,7 @@ public sealed unsafe partial class ClrDataStackWalk : IXCLRDataStackWalk
     private bool _currentFrameIsValid;
     private IEnumerator<IStackDataFrameHandle> _dataFrames;
 
-    public ClrDataStackWalk(TargetPointer threadAddr, uint flags, Target target, IXCLRDataStackWalk? legacyImpl)
+    public ClrDataStackWalk(TargetPointer threadAddr, CLRDataStackWalkFlag flags, Target target, IXCLRDataStackWalk? legacyImpl)
     {
         _threadAddr = threadAddr;
         _flags = flags;
@@ -54,10 +54,10 @@ private bool MoveNextLegacyVisible()
         return false;
     }
 
-    internal static bool IsLegacyVisible(IStackDataFrameHandle frame)
+    internal bool IsLegacyVisible(IStackDataFrameHandle frame)
         => frame.State is StackWalkState.Frameless
-                       or StackWalkState.Frame
-                       or StackWalkState.SkippedFrame;
+            || ((_flags & CLRDataStackWalkFlag.CLRDATA_SIMPFRAME_RUNTIME_UNMANAGED_CODE) != 0
+                && frame.State is StackWalkState.Frame or StackWalkState.SkippedFrame);
 
     private void Reseed(byte[] context, bool isFirst)
     {
diff --git a/src/native/managed/cdac/Microsoft.Diagnostics.DataContractReader.Legacy/ClrDataTask.cs b/src/native/managed/cdac/Microsoft.Diagnostics.DataContractReader.Legacy/ClrDataTask.cs
index f425cffa2e7f7d..d774e44e582a87 100644
--- a/src/native/managed/cdac/Microsoft.Diagnostics.DataContractReader.Legacy/ClrDataTask.cs
+++ b/src/native/managed/cdac/Microsoft.Diagnostics.DataContractReader.Legacy/ClrDataTask.cs
@@ -66,7 +66,7 @@ int IXCLRDataTask.GetDesiredExecutionState(uint* state)
     int IXCLRDataTask.SetDesiredExecutionState(uint state)
         => HResults.E_NOTIMPL;
 
-    int IXCLRDataTask.CreateStackWalk(uint flags, DacComNullableByRef<IXCLRDataStackWalk> stackWalk)
+    int IXCLRDataTask.CreateStackWalk(CLRDataStackWalkFlag flags, DacComNullableByRef<IXCLRDataStackWalk> stackWalk)
     {
         Contracts.ThreadData threadData = _target.Contracts.Thread.GetThreadData(_address);
         if (threadData.State.HasFlag(Contracts.ThreadState.Unstarted))
diff --git a/src/native/managed/cdac/Microsoft.Diagnostics.DataContractReader.Legacy/IXCLRData.cs b/src/native/managed/cdac/Microsoft.Diagnostics.DataContractReader.Legacy/IXCLRData.cs
index 45ac79081e971d..84a679ecc60c94 100644
--- a/src/native/managed/cdac/Microsoft.Diagnostics.DataContractReader.Legacy/IXCLRData.cs
+++ b/src/native/managed/cdac/Microsoft.Diagnostics.DataContractReader.Legacy/IXCLRData.cs
@@ -520,7 +520,7 @@ public unsafe partial interface IXCLRDataTask
     int SetDesiredExecutionState(uint state);
 
     [PreserveSig]
-    int CreateStackWalk(uint flags, DacComNullableByRef<IXCLRDataStackWalk> stackWalk);
+    int CreateStackWalk(CLRDataStackWalkFlag flags, DacComNullableByRef<IXCLRDataStackWalk> stackWalk);
 
     [PreserveSig]
     int GetOSThreadID(uint* id);
@@ -996,6 +996,12 @@ public enum CLRDataStackWalkRequest : uint
     CLRDATA_STACK_WALK_REQUEST_SET_FIRST_FRAME = 0xe1000000,
 }
 
+[Flags]
+public enum CLRDataStackWalkFlag : uint
+{
+    CLRDATA_SIMPFRAME_RUNTIME_UNMANAGED_CODE = 0x8,
+}
+
 [Flags]
 public enum CLRDataStackSetContextFlag : uint
 {