diff --git a/src/libraries/System.Private.CoreLib/src/System/Numerics/Matrix4x4.cs b/src/libraries/System.Private.CoreLib/src/System/Numerics/Matrix4x4.cs
index d82739a16add07..0ea71be499a6f3 100644
--- a/src/libraries/System.Private.CoreLib/src/System/Numerics/Matrix4x4.cs
+++ b/src/libraries/System.Private.CoreLib/src/System/Numerics/Matrix4x4.cs
@@ -1778,7 +1778,7 @@ public static Matrix4x4 Subtract(Matrix4x4 value1, Matrix4x4 value2)
         }
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        private static Vector128<float> Permute(Vector128<float> value, byte control)
+        private static Vector128<float> Permute(Vector128<float> value, [ConstantExpected] byte control)
         {
             if (Avx.IsSupported)
             {