diff --git a/third_party/phpcommon b/third_party/phpcommon
index cdb9b1af..5979f465 160000
--- a/third_party/phpcommon
+++ b/third_party/phpcommon
@@ -1 +1 @@
-Subproject commit cdb9b1af750831d5d278f8069d57abf3d19e1c07
+Subproject commit 5979f4656e7d27d8934db06039e9306ff6307a0c
diff --git a/webapp/controller/BaseAuthedController.class.php b/webapp/controller/BaseAuthedController.class.php
index a21cba5f..4cf8ff96 100644
--- a/webapp/controller/BaseAuthedController.class.php
+++ b/webapp/controller/BaseAuthedController.class.php
@@ -130,7 +130,8 @@ class BaseAuthedController extends BaseController {
             }
         }
         if (!(myself()->_getChannel() == IMTBL_CHANNEL ||
-              myself()->_getChannel() == GUEST_CHANNEL)) {
+              myself()->_getChannel() == GUEST_CHANNEL ||
+              myself()->_getChannel() == POLY_CHANNEL)) {
             phpcommon\sendError(1001, 'session expiration');
             die();
         }