diff --git a/src/coreclr/jit/lowerxarch.cpp b/src/coreclr/jit/lowerxarch.cpp
index 3adeccf516fd1..83d67383da264 100644
--- a/src/coreclr/jit/lowerxarch.cpp
+++ b/src/coreclr/jit/lowerxarch.cpp
@@ -3901,7 +3901,7 @@ GenTree* Lowering::LowerHWIntrinsicTernaryLogic(GenTreeHWIntrinsic* node)
                         std::swap(node->Op(1), node->Op(2));
 
                         // Make sure we also fixup the control byte
-                        control = TernaryLogicInfo::GetTernaryControlByte(info, C, A, B);
+                        control = TernaryLogicInfo::GetTernaryControlByte(info, B, C, A);
                         op4->AsIntCon()->SetIconValue(control);
 
                         useFlags = TernaryLogicUseFlags::BC;
diff --git a/src/tests/JIT/Regression/JitBlue/Runtime_107587/Runtime_107587.cs b/src/tests/JIT/Regression/JitBlue/Runtime_107587/Runtime_107587.cs
new file mode 100644
index 0000000000000..e9efb711716fe
--- /dev/null
+++ b/src/tests/JIT/Regression/JitBlue/Runtime_107587/Runtime_107587.cs
@@ -0,0 +1,37 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+// Found by Antigen
+// Reduced from 20.86 KB to 1.7 KB.
+// JIT assert failed:
+// Assertion failed 'unreached' in 'Runtime_107587:Method0():this' during 'Lowering nodeinfo' (IL size 133; hash 0x46e9aa75; FullOpts)
+
+    // File: D:\a\_work\1\s\src\coreclr\jit\lowerxarch.cpp Line: 11752
+
+using System;
+using System.Collections.Generic;
+using System.Runtime.CompilerServices;
+using System.Runtime.Intrinsics;
+using System.Runtime.Intrinsics.Arm;
+using System.Runtime.Intrinsics.X86;
+using System.Numerics;
+using Xunit;
+
+public class Runtime_107587
+{
+    static Vector512<sbyte> s_v512_sbyte_42 = Vector512.Create((sbyte)92);
+    public Vector512<sbyte> Method0()
+    {
+        byte byte_152 = 3;
+        return Avx512F.TernaryLogic(s_v512_sbyte_42, s_v512_sbyte_42, s_v512_sbyte_42, byte_152);
+    }
+    
+    [Fact]   
+    public static void TestEntryPoint()
+    {
+        if (Avx512F.IsSupported)
+        {
+            new Runtime_107587().Method0();
+        }
+    }
+}
diff --git a/src/tests/JIT/Regression/JitBlue/Runtime_107587/Runtime_107587.csproj b/src/tests/JIT/Regression/JitBlue/Runtime_107587/Runtime_107587.csproj
new file mode 100644
index 0000000000000..de6d5e08882e8
--- /dev/null
+++ b/src/tests/JIT/Regression/JitBlue/Runtime_107587/Runtime_107587.csproj
@@ -0,0 +1,8 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <Optimize>True</Optimize>
+  </PropertyGroup>
+  <ItemGroup>
+    <Compile Include="$(MSBuildProjectName).cs" />
+  </ItemGroup>
+</Project>