diff --git a/CHANGES.rst b/CHANGES.rst
index d31637a..be0531b 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -22,6 +22,7 @@ develop
 * Tox test suite updated to runs against Python 2.7/3.3/3.4/3.5 and
   Django 1.8/1.9.
 * Build wheels from tox environment to ensure consistency.
+* Remove `debug` argment from `PostgresGreenlet` class (unused).
 
 0.18.1 (2015-11-06)
 -------------------
diff --git a/dddp/main.py b/dddp/main.py
index f4783a5..dd8d12c 100644
--- a/dddp/main.py
+++ b/dddp/main.py
@@ -103,9 +103,7 @@ class DDPLauncher(object):
             # shutdown existing connections
             close_old_connections()
 
-            DDPLauncher.pgworker = PostgresGreenlet(
-                connection, debug=debug,
-            )
+            DDPLauncher.pgworker = PostgresGreenlet(connection)
 
         # use settings.WSGI_APPLICATION or fallback to default Django WSGI app
         from django.conf import settings
diff --git a/dddp/postgres.py b/dddp/postgres.py
index 88c993d..a513028 100644
--- a/dddp/postgres.py
+++ b/dddp/postgres.py
@@ -16,7 +16,7 @@ class PostgresGreenlet(gevent.Greenlet):
 
     """Greenlet for multiplexing database operations."""
 
-    def __init__(self, conn, debug=False):
+    def __init__(self, conn):
         """Prepare async connection."""
         super(PostgresGreenlet, self).__init__()
         import logging