diff --git a/notebook/base/zmqhandlers.py b/notebook/base/zmqhandlers.py
index 1cfa8ecb3..4c4aa0044 100644
--- a/notebook/base/zmqhandlers.py
+++ b/notebook/base/zmqhandlers.py
@@ -132,15 +132,11 @@ class WebSocketMixin(object):
         host = self.request.headers.get("Host")
         if origin is None:
             origin = self.get_origin()
-        
-        # If no header is provided, assume we can't verify origin
-        if origin is None:
-            self.log.warn("Missing Origin header, rejecting WebSocket connection.")
-            return False
-        if host is None:
-            self.log.warn("Missing Host header, rejecting WebSocket connection.")
-            return False
-        
+
+        # If no origin or host header is provided, assume from script
+        if origin is None or host is None:
+            return True
+
         origin = origin.lower()
         origin_host = urlparse(origin).netloc