diff --git a/lib/transports/xhr-polling.js b/lib/transports/xhr-polling.js
index 65766b68..81e9602c 100644
--- a/lib/transports/xhr-polling.js
+++ b/lib/transports/xhr-polling.js
@@ -48,6 +48,8 @@
 					if (status == 200){
 						if (self._xhr.responseText.length) self._onData(self._xhr.responseText);
 						self._get();
+					} else {
+						self._onDisconnect();
 					}
 				}
 			};
diff --git a/socket.io.js b/socket.io.js
index 386a6a98..c3fc60d9 100644
--- a/socket.io.js
+++ b/socket.io.js
@@ -583,6 +583,8 @@ if ('jQuery' in this) jQuery.io = this.io;
 					if (status == 200){
 						if (self._xhr.responseText.length) self._onData(self._xhr.responseText);
 						self._get();
+					} else {
+						self._onDisconnect();
 					}
 				}
 			};