diff --git a/src/Microsoft.PowerShell.ConsoleHost/host/msh/ConsoleControl.cs b/src/Microsoft.PowerShell.ConsoleHost/host/msh/ConsoleControl.cs
index 71804e87ce..cc385c1ee7 100644
--- a/src/Microsoft.PowerShell.ConsoleHost/host/msh/ConsoleControl.cs
+++ b/src/Microsoft.PowerShell.ConsoleHost/host/msh/ConsoleControl.cs
@@ -1,4 +1,4 @@
-#if !OPEN
+#if !PORTABLE
 /********************************************************************++
 Copyright (c) Microsoft Corporation.  All rights reserved.
 --********************************************************************/
diff --git a/src/Microsoft.PowerShell.ConsoleHost/host/msh/ConsoleHost.cs b/src/Microsoft.PowerShell.ConsoleHost/host/msh/ConsoleHost.cs
index 66c4aa8d32..3b7f69e662 100644
--- a/src/Microsoft.PowerShell.ConsoleHost/host/msh/ConsoleHost.cs
+++ b/src/Microsoft.PowerShell.ConsoleHost/host/msh/ConsoleHost.cs
@@ -197,7 +197,7 @@ namespace Microsoft.PowerShell
             System.Threading.Thread.CurrentThread.Name = "ConsoleHost main thread";
 
             theConsoleHost = ConsoleHost.CreateSingletonInstance(configuration);
-#if !OPEN
+#if !PORTABLE
             theConsoleHost.BindBreakHandler();
 #endif
 
@@ -277,7 +277,7 @@ namespace Microsoft.PowerShell
 
 
 
-#if !OPEN
+#if !PORTABLE
         /// <summary>
         /// 
         /// The break handler for the program.  Dispatches a break event to the current Executor.
@@ -436,7 +436,7 @@ namespace Microsoft.PowerShell
             // call the console APIs directly, instead of ui.rawui.FlushInputHandle, as ui may be finalized
             // already if this thread is lagging behind the main thread.
 
-#if !OPEN
+#if !PORTABLE
             ConsoleHandle handle = ConsoleControl.GetInputHandle();
             ConsoleControl.FlushConsoleInputBuffer(handle);
 #endif
@@ -1032,7 +1032,7 @@ namespace Microsoft.PowerShell
 #endif
         }
 
-#if !OPEN
+#if !PORTABLE
         private void BindBreakHandler()
         {
             breakHandlerGcHandle = GCHandle.Alloc(new ConsoleControl.BreakHandler(MyBreakHandler));
@@ -1091,7 +1091,7 @@ namespace Microsoft.PowerShell
         {
             if (!isDisposed)
             {
-#if !OPEN
+#if !PORTABLE
                 Dbg.Assert(breakHandlerGcHandle != null, "break handler should be set");
                 ConsoleControl.RemoveBreakHandler();
                 breakHandlerGcHandle.Free();
@@ -2849,7 +2849,7 @@ namespace Microsoft.PowerShell
             /// </summary>
             private RunspaceRef runspaceRef;
 
-#if !OPEN
+#if !PORTABLE
         private GCHandle breakHandlerGcHandle;
 #endif
         private System.Threading.Thread breakHandlerThread;
diff --git a/src/Microsoft.PowerShell.ConsoleHost/host/msh/ConsoleHostRawUserInterface.cs b/src/Microsoft.PowerShell.ConsoleHost/host/msh/ConsoleHostRawUserInterface.cs
index 888f454ded..3334357812 100644
--- a/src/Microsoft.PowerShell.ConsoleHost/host/msh/ConsoleHostRawUserInterface.cs
+++ b/src/Microsoft.PowerShell.ConsoleHost/host/msh/ConsoleHostRawUserInterface.cs
@@ -1,4 +1,4 @@
-#if !OPEN
+#if !PORTABLE
 /********************************************************************++
 Copyright (c) Microsoft Corporation.  All rights reserved.
 --********************************************************************/
diff --git a/src/Microsoft.PowerShell.ConsoleHost/host/msh/ConsoleHostUserInterface.cs b/src/Microsoft.PowerShell.ConsoleHost/host/msh/ConsoleHostUserInterface.cs
index 7106b101f8..218f4e535a 100644
--- a/src/Microsoft.PowerShell.ConsoleHost/host/msh/ConsoleHostUserInterface.cs
+++ b/src/Microsoft.PowerShell.ConsoleHost/host/msh/ConsoleHostUserInterface.cs
@@ -14,7 +14,7 @@ using System.Management.Automation.Internal;
 using System.Management.Automation.Host;
 using System.Security;
 using Dbg = System.Management.Automation.Diagnostics;
-#if !OPEN
+#if !PORTABLE
 using ConsoleHandle = Microsoft.Win32.SafeHandles.SafeFileHandle;
 #endif
 
@@ -62,7 +62,7 @@ namespace Microsoft.PowerShell
             this.rawui = new ConsoleHostRawUserInterface(this);
             isInteractiveTestToolListening = false;
 
-#if OPEN
+#if PORTABLE
             this._supportsVirtualTerminal = false;
 #else
             // Turn on virtual terminal if possible.
@@ -278,7 +278,7 @@ namespace Microsoft.PowerShell
 
         private object ReadLineSafe(bool isSecureString, char? printToken)
         {
-#if OPEN
+#if PORTABLE
             throw new PlatformNotSupportedException("Cannot read secure strings!");
 #else
             // Don't lock (instanceLock) in here -- the caller needs to do that...
@@ -404,7 +404,7 @@ namespace Microsoft.PowerShell
 #endif
         }
 
-#if !OPEN
+#if !PORTABLE
 
         /// <summary>
         ///
@@ -553,7 +553,7 @@ namespace Microsoft.PowerShell
         internal void WriteToConsole(string value, bool transcribeResult)
         {
 
-#if !OPEN
+#if !PORTABLE
             ConsoleHandle handle = ConsoleControl.GetActiveScreenBufferHandle();
 
             // Ensure that we're in the proper line-output mode.  We don't lock here as it does not matter if we
@@ -576,7 +576,7 @@ namespace Microsoft.PowerShell
 
             // This is atomic, so we don't lock here...
 
-#if !OPEN
+#if !PORTABLE
             ConsoleControl.WriteConsole(handle, value);
 #else
             Console.Out.Write(value);
@@ -1624,7 +1624,7 @@ namespace Microsoft.PowerShell
 
         private string ReadLineFromConsole(bool endOnTab, string initialContent, bool calledFromPipeline, ref string restOfLine, ref ReadLineResult result)
         {
-#if OPEN
+#if PORTABLE
             return ReadLineFromFile(initialContent);
 #else
 
@@ -1759,7 +1759,7 @@ namespace Microsoft.PowerShell
         /// </summary>
         /// <param name="cursorPosition">the cursor position where 'tab' is hit</param>
         /// <returns></returns>
-#if !OPEN
+#if !PORTABLE
         private char GetCharacterUnderCursor(Coordinates cursorPosition)
         {
             Rectangle region = new Rectangle(0, cursorPosition.Y, RawUI.BufferSize.Width - 1, cursorPosition.Y);
@@ -1956,7 +1956,7 @@ namespace Microsoft.PowerShell
                     if (restOfLine != string.Empty)
                     {
                         lastCompletion = completedInput.Remove(completedInput.Length - restOfLine.Length);
-#if !OPEN
+#if !PORTABLE
                         SendLeftArrows(restOfLine.Length);
 #endif
                     }
@@ -1982,7 +1982,7 @@ namespace Microsoft.PowerShell
             return input;
         }
 
-#if !OPEN
+#if !PORTABLE
         private void SendLeftArrows(int length)
         {
             var inputs = new ConsoleControl.INPUT[length * 2];
diff --git a/src/Microsoft.PowerShell.ConsoleHost/project.json b/src/Microsoft.PowerShell.ConsoleHost/project.json
index babf345d0c..d4e1d0b7b6 100644
--- a/src/Microsoft.PowerShell.ConsoleHost/project.json
+++ b/src/Microsoft.PowerShell.ConsoleHost/project.json
@@ -25,7 +25,7 @@
         "netstandard1.5": {
             "imports": [ "dnxcore50", "portable-net45+win8" ],
             "compilationOptions": {
-                "define": [ "CORECLR", "OPEN" ]
+                "define": [ "CORECLR", "PORTABLE" ]
             },
             "dependencies": {
                 "Newtonsoft.Json": "8.0.2",
diff --git a/src/Microsoft.PowerShell.ConsoleHost/singleshell/installer/EngineInstaller.cs b/src/Microsoft.PowerShell.ConsoleHost/singleshell/installer/EngineInstaller.cs
index 260c56229d..3e7971855f 100644
--- a/src/Microsoft.PowerShell.ConsoleHost/singleshell/installer/EngineInstaller.cs
+++ b/src/Microsoft.PowerShell.ConsoleHost/singleshell/installer/EngineInstaller.cs
@@ -1,4 +1,4 @@
-#if !OPEN
+#if !PORTABLE
 /********************************************************************++
 Copyright (c) Microsoft Corporation.  All rights reserved.
 --********************************************************************/
diff --git a/src/Microsoft.PowerShell.ConsoleHost/singleshell/installer/MshHostMshSnapin.cs b/src/Microsoft.PowerShell.ConsoleHost/singleshell/installer/MshHostMshSnapin.cs
index 07fc481bf0..0b9a0f65e2 100644
--- a/src/Microsoft.PowerShell.ConsoleHost/singleshell/installer/MshHostMshSnapin.cs
+++ b/src/Microsoft.PowerShell.ConsoleHost/singleshell/installer/MshHostMshSnapin.cs
@@ -1,4 +1,4 @@
-#if !OPEN
+#if !PORTABLE
 /********************************************************************++
 Copyright (c) Microsoft Corporation.  All rights reserved.
 --********************************************************************/