diff --git a/code/hooks.js b/code/hooks.js
index f0c4b66f..5b4eb167 100644
--- a/code/hooks.js
+++ b/code/hooks.js
@@ -42,7 +42,7 @@
 //              array to change order or add additional values to the
 //              details of a portal.
 // beforePortalReRender: the callback argument is
-//              {portal: ent[2], oldPortal : d, reRender : false}.
+//              {portal: ent[2], oldPortal : d, portalGuid: ent[0], reRender : false}.
 //              The callback needs to update the value of reRender to
 //              true if the plugin has a reason to have the portal
 //              redrawn. It is called early on in the
diff --git a/code/map_data.js b/code/map_data.js
index 118172fa..45af74c3 100644
--- a/code/map_data.js
+++ b/code/map_data.js
@@ -264,7 +264,7 @@ window.renderPortal = function(ent) {
     u = u || oo.level !== portalLevel;
 
     // Allow plugins to add additional conditions as to when a portal gets re-rendered
-    var hookData = {portal: ent[2], oldPortal: oo.details, reRender: false};
+    var hookData = {portal: ent[2], oldPortal: oo.details, portalGuid: ent[0], reRender: false};
     runHooks('beforePortalReRender', hookData);
     u = u || hookData.reRender;