diff --git a/src/Build/BackEnd/Node/OutOfProcNode.cs b/src/Build/BackEnd/Node/OutOfProcNode.cs
index 80e36648f23..9e500181510 100644
--- a/src/Build/BackEnd/Node/OutOfProcNode.cs
+++ b/src/Build/BackEnd/Node/OutOfProcNode.cs
@@ -118,11 +118,6 @@ public class OutOfProcNode : INode, IBuildComponentHost, INodePacketFactory, INo
         /// </summary>
         private Exception _shutdownException;
 
-        /// <summary>
-        /// Flag indicating if we should debug communications or not.
-        /// </summary>
-        private readonly bool _debugCommunications;
-
         /// <summary>
         /// Data for the use of LegacyThreading semantics.
         /// </summary>
@@ -140,8 +135,6 @@ public OutOfProcNode()
         {
             s_isOutOfProcNode = true;
 
-            _debugCommunications = (Environment.GetEnvironmentVariable("MSBUILDDEBUGCOMM") == "1");
-
             _receivedPackets = new ConcurrentQueue<INodePacket>();
             _packetReceivedEvent = new AutoResetEvent(false);
             _shutdownEvent = new ManualResetEvent(false);
diff --git a/src/Shared/NodeEndpointOutOfProcBase.cs b/src/Shared/NodeEndpointOutOfProcBase.cs
index 99f43c83280..3d468e23e95 100644
--- a/src/Shared/NodeEndpointOutOfProcBase.cs
+++ b/src/Shared/NodeEndpointOutOfProcBase.cs
@@ -43,11 +43,6 @@ internal abstract class NodeEndpointOutOfProcBase : INodeEndpoint
         /// </summary>
         private const int PipeBufferSize = 131072;
 
-        /// <summary>
-        /// Flag indicating if we should debug communications or not.
-        /// </summary>
-        private bool _debugCommunications = false;
-
         /// <summary>
         /// The current communication status of the node.
         /// </summary>
@@ -193,8 +188,6 @@ internal void InternalConstruct(string pipeName)
         {
             ErrorUtilities.VerifyThrowArgumentLength(pipeName, nameof(pipeName));
 
-            _debugCommunications = (Environment.GetEnvironmentVariable("MSBUILDDEBUGCOMM") == "1");
-
             _status = LinkStatus.Inactive;
             _asyncDataMonitor = new object();
             _sharedReadBuffer = InterningBinaryReader.CreateSharedBuffer();