diff --git a/src/libraries/Common/src/System/Runtime/InteropServices/SuppressGCTransitionAttribute.internal.cs b/src/libraries/Common/src/System/Runtime/InteropServices/SuppressGCTransitionAttribute.internal.cs
deleted file mode 100644
index e9fbb73111d2f0..00000000000000
--- a/src/libraries/Common/src/System/Runtime/InteropServices/SuppressGCTransitionAttribute.internal.cs
+++ /dev/null
@@ -1,12 +0,0 @@
-// Licensed to the .NET Foundation under one or more agreements.
-// The .NET Foundation licenses this file to you under the MIT license.
-
-// Internal copy of SuppressGCTransitionAttribute used only to enable files
-// that use this to compile.  On any platforms that support this attribute,
-// the real one exposed from CoreLib should be used.
-
-namespace System.Runtime.InteropServices
-{
-    [AttributeUsage(AttributeTargets.Method)]
-    internal sealed class SuppressGCTransitionAttribute : Attribute { }
-}
diff --git a/src/libraries/Microsoft.IO.Redist/src/Microsoft.IO.Redist.csproj b/src/libraries/Microsoft.IO.Redist/src/Microsoft.IO.Redist.csproj
index 5e8d6bcfed8545..2614f3c3181ba0 100644
--- a/src/libraries/Microsoft.IO.Redist/src/Microsoft.IO.Redist.csproj
+++ b/src/libraries/Microsoft.IO.Redist/src/Microsoft.IO.Redist.csproj
@@ -190,7 +190,8 @@
              Link="Common\System\IO\PathInternal.CaseSensitivity.cs" />
     <Compile Include="$(CommonPath)System\Memory\FixedBufferExtensions.cs"
              Link="Common\System\Memory\FixedBufferExtensions.cs" />
-    <Compile Include="$(CommonPath)System\Runtime\InteropServices\SuppressGCTransitionAttribute.internal.cs" />
+    <Compile Include="$(CoreLibSharedDir)System\Runtime\InteropServices\SuppressGCTransitionAttribute.cs"
+             Link="System\Runtime\InteropServices\SuppressGCTransitionAttribute.cs" />
     <Compile Include="Microsoft\IO\StringExtensions.cs" />
   </ItemGroup>
   <ItemGroup>
diff --git a/src/libraries/Microsoft.Win32.SystemEvents/src/Microsoft.Win32.SystemEvents.csproj b/src/libraries/Microsoft.Win32.SystemEvents/src/Microsoft.Win32.SystemEvents.csproj
index 407a37698931ec..0470f8b07a7963 100644
--- a/src/libraries/Microsoft.Win32.SystemEvents/src/Microsoft.Win32.SystemEvents.csproj
+++ b/src/libraries/Microsoft.Win32.SystemEvents/src/Microsoft.Win32.SystemEvents.csproj
@@ -113,8 +113,8 @@
     <Compile Include="Microsoft\Win32\UserPreferenceChangingEventHandler.cs" />
   </ItemGroup>
   <ItemGroup Condition="'$(TargetFramework)' != '$(NetCoreAppCurrent)'">
-    <Compile Include="$(CommonPath)System\Runtime\InteropServices\SuppressGCTransitionAttribute.internal.cs"
-             Link="Common\System\Runtime\InteropServices\SuppressGCTransitionAttribute.internal.cs" />
+    <Compile Include="$(CoreLibSharedDir)System\Runtime\InteropServices\SuppressGCTransitionAttribute.cs"
+             Link="System\Runtime\InteropServices\SuppressGCTransitionAttribute.cs" />
   </ItemGroup>
   <ItemGroup Condition="$(TargetFramework.StartsWith('net4'))">
     <Reference Include="mscorlib" />
diff --git a/src/libraries/System.IO.FileSystem.AccessControl/src/System.IO.FileSystem.AccessControl.csproj b/src/libraries/System.IO.FileSystem.AccessControl/src/System.IO.FileSystem.AccessControl.csproj
index ac6c8e8a6690c4..3d496a69c3f217 100644
--- a/src/libraries/System.IO.FileSystem.AccessControl/src/System.IO.FileSystem.AccessControl.csproj
+++ b/src/libraries/System.IO.FileSystem.AccessControl/src/System.IO.FileSystem.AccessControl.csproj
@@ -12,7 +12,8 @@
     <GeneratePlatformNotSupportedAssemblyMessage Condition="'$(TargetsWindows)' != 'true'">SR.PlatformNotSupported_AccessControl</GeneratePlatformNotSupportedAssemblyMessage>
   </PropertyGroup>
   <ItemGroup Condition="!$(TargetFramework.StartsWith('$(NetCoreAppCurrent)'))">
-    <Compile Include="$(CommonPath)System\Runtime\InteropServices\SuppressGCTransitionAttribute.internal.cs" />
+    <Compile Include="$(CoreLibSharedDir)System\Runtime\InteropServices\SuppressGCTransitionAttribute.cs"
+             Link="System\Runtime\InteropServices\SuppressGCTransitionAttribute.cs" />
   </ItemGroup>
   <!-- Source includes -->
   <ItemGroup Condition="'$(TargetsWindows)' == 'true' and !$(TargetFramework.StartsWith('net4'))">
diff --git a/src/libraries/System.Private.CoreLib/src/System/Runtime/InteropServices/SuppressGCTransitionAttribute.cs b/src/libraries/System.Private.CoreLib/src/System/Runtime/InteropServices/SuppressGCTransitionAttribute.cs
index 1909af3f6d6ddc..21b8a615f1a7fd 100644
--- a/src/libraries/System.Private.CoreLib/src/System/Runtime/InteropServices/SuppressGCTransitionAttribute.cs
+++ b/src/libraries/System.Private.CoreLib/src/System/Runtime/InteropServices/SuppressGCTransitionAttribute.cs
@@ -42,6 +42,9 @@ namespace System.Runtime.InteropServices
     /// In general, usage of this attribute is not recommended if debugging the P/Invoke is important, for example
     /// stepping through the native code or diagnosing an exception thrown from the native code.
     ///
+    /// The runtime may load the native library for method marked with this attribute in advance before the method is called for the first time.
+    /// Usage of this attribute is not recommended for platform neutral libraries with conditional platform specific code.
+    ///
     /// The P/Invoke method that this attribute is applied to must have all of the following properties:
     ///   * Native function always executes for a trivial amount of time (less than 1 microsecond).
     ///   * Native function does not perform a blocking syscall (e.g. any type of I/O).
@@ -55,7 +58,12 @@ namespace System.Runtime.InteropServices
     ///   * Data corruption.
     /// </remarks>
     [AttributeUsage(AttributeTargets.Method, Inherited = false)]
-    public sealed class SuppressGCTransitionAttribute : Attribute
+#if SYSTEM_PRIVATE_CORELIB
+    public
+#else
+    internal
+#endif
+    sealed class SuppressGCTransitionAttribute : Attribute
     {
         public SuppressGCTransitionAttribute()
         {