diff --git a/src/waitress/task.py b/src/waitress/task.py
index 574532fa..956c0c0f 100644
--- a/src/waitress/task.py
+++ b/src/waitress/task.py
@@ -345,8 +345,9 @@ class ErrorTask(Task):
     complete = True
 
     def execute(self):
+        ident = self.channel.server.adj.ident
         e = self.request.error
-        status, headers, body = e.to_response()
+        status, headers, body = e.to_response(ident)
         self.status = status
         self.response_headers.extend(headers)
         # We need to explicitly tell the remote client we are closing the
diff --git a/src/waitress/utilities.py b/src/waitress/utilities.py
index 164752f9..3c397874 100644
--- a/src/waitress/utilities.py
+++ b/src/waitress/utilities.py
@@ -258,10 +258,11 @@ class Error:
     def __init__(self, body):
         self.body = body
 
-    def to_response(self):
+    def to_response(self, ident=None):
         status = f"{self.code} {self.reason}"
         body = f"{self.reason}\r\n\r\n{self.body}"
-        tag = "\r\n\r\n(generated by waitress)"
+        ident = ident if ident else "server"
+        tag = f"\r\n\r\n(generated by {ident})"
         body = (body + tag).encode("utf-8")
         headers = [("Content-Type", "text/plain; charset=utf-8")]