diff --git a/gunicorn/http/errors.py b/gunicorn/http/errors.py
index dd9a602b..beafa05c 100644
--- a/gunicorn/http/errors.py
+++ b/gunicorn/http/errors.py
@@ -6,7 +6,7 @@
 class ParseException(Exception):
     pass
 
-class NoMoreData(ParseException):
+class NoMoreData(ParseException, StopIteration):
     def __init__(self, buf=None):
         self.buf = buf
     def __str__(self):
diff --git a/gunicorn/workers/async.py b/gunicorn/workers/async.py
index b1898e99..6f31e314 100644
--- a/gunicorn/workers/async.py
+++ b/gunicorn/workers/async.py
@@ -36,8 +36,8 @@ class AsyncWorker(base.Worker):
                     if not req:
                         break
                     self.handle_request(req, client, addr)
-            except StopIteration:
-                pass
+            except StopIteration, e:
+                self.log.debug("Closing connection. %s", e)
         except socket.error, e:
             if e[0] not in (errno.EPIPE, errno.ECONNRESET):
                 self.log.exception("Socket error processing request.")
diff --git a/gunicorn/workers/sync.py b/gunicorn/workers/sync.py
index b89830ca..d619c365 100644
--- a/gunicorn/workers/sync.py
+++ b/gunicorn/workers/sync.py
@@ -69,8 +69,8 @@ class SyncWorker(base.Worker):
             parser = http.RequestParser(client)
             req = parser.next()
             self.handle_request(req, client, addr)
-        except StopIteration:
-            self.log.debug("Ignored premature client disconnection.")
+        except StopIteration, e:
+            self.log.debug("Closing connection. %s", e)
         except socket.error, e:
             if e[0] != errno.EPIPE:
                 self.log.exception("Error processing request.")