diff --git a/src/waitress/task.py b/src/waitress/task.py
index 620bbdf6..36fb133a 100644
--- a/src/waitress/task.py
+++ b/src/waitress/task.py
@@ -567,6 +567,10 @@ def get_environment(self):
         # channel_request_lookahead larger than 0.
         environ["waitress.client_disconnected"] = self.channel.check_client_disconnected
 
+        # Insert the raw socket object into the environment that allows the
+        # application to upgrade to WebSocket communication.
+        environ["waitress.socket"] = self.channel.socket
+
         # cache the environ for this request
         self.environ = environ
         return environ
diff --git a/tests/test_task.py b/tests/test_task.py
index 278ab538..8ff4f409 100644
--- a/tests/test_task.py
+++ b/tests/test_task.py
@@ -1,4 +1,5 @@
 import io
+import socket
 import unittest
 
 
@@ -804,6 +805,7 @@ def test_get_environment_values(self):
                 "SERVER_PROTOCOL",
                 "SERVER_SOFTWARE",
                 "waitress.client_disconnected",
+                "waitress.socket",
                 "wsgi.errors",
                 "wsgi.file_wrapper",
                 "wsgi.input",
@@ -960,6 +962,7 @@ class DummyChannel:
     adj = DummyAdj()
     creation_time = 0
     addr = ("127.0.0.1", 39830)
+    socket = socket.socket()
 
     def check_client_disconnected(self):
         # For now, until we have tests handling this feature