diff --git a/src/System.Private.CoreLib/System.Private.CoreLib.csproj b/src/System.Private.CoreLib/System.Private.CoreLib.csproj
index 1053e64ae5ef..831c38c8e6a5 100644
--- a/src/System.Private.CoreLib/System.Private.CoreLib.csproj
+++ b/src/System.Private.CoreLib/System.Private.CoreLib.csproj
@@ -357,7 +357,6 @@
   </ItemGroup>
   <ItemGroup Condition="'$(TargetsWindows)' == 'true'">
     <Compile Include="$(BclSourcesRoot)\System\DateTime.Windows.cs" />
-    <Compile Include="$(BclSourcesRoot)\Interop\Windows\Kernel32\Interop.GetSystemDirectoryW.cs" />
     <Compile Include="$(BclSourcesRoot)\System\ApplicationModel.Windows.cs" />
     <Compile Include="$(BclSourcesRoot)\System\Globalization\GlobalizationMode.Windows.cs" />
     <Compile Include="$(BclSourcesRoot)\System\Threading\ClrThreadPoolBoundHandle.Windows.cs" />
diff --git a/src/System.Private.CoreLib/src/Interop/Windows/Kernel32/Interop.GetSystemDirectoryW.cs b/src/System.Private.CoreLib/src/Interop/Windows/Kernel32/Interop.GetSystemDirectoryW.cs
deleted file mode 100644
index cf1b31d62c0c..000000000000
--- a/src/System.Private.CoreLib/src/Interop/Windows/Kernel32/Interop.GetSystemDirectoryW.cs
+++ /dev/null
@@ -1,23 +0,0 @@
-// Licensed to the .NET Foundation under one or more agreements.
-// The .NET Foundation licenses this file to you under the MIT license.
-// See the LICENSE file in the project root for more information.
-
-using System;
-using System.Runtime.InteropServices;
-
-internal static partial class Interop
-{
-    internal static partial class Kernel32
-    {
-        [DllImport(Libraries.Kernel32, CharSet = CharSet.Unicode, SetLastError = true)]
-        private static extern unsafe int GetSystemDirectoryW(char* lpBuffer, int uSize);
-
-        internal static unsafe int GetSystemDirectoryW(Span<char> buffer)
-        {
-            fixed (char* bufferPtr = &MemoryMarshal.GetReference(buffer))
-            {
-                return GetSystemDirectoryW(bufferPtr, buffer.Length);
-            }
-        }
-    }
-}