diff --git a/gunicorn/glogging.py b/gunicorn/glogging.py
index 8096f969..8c3631ba 100644
--- a/gunicorn/glogging.py
+++ b/gunicorn/glogging.py
@@ -130,6 +130,9 @@ class LazyWriter(object):
     def isatty(self):
         return bool(self.fileobj and self.fileobj.isatty())
 
+    def fileno():
+        return self.fileobj.fileno()
+
 
 class SafeAtoms(dict):