diff --git a/package.json b/package.json
index e4ee50baf..1e4469f75 100644
--- a/package.json
+++ b/package.json
@@ -61,6 +61,7 @@
       "GM.setValue",
       "GM.deleteValue",
       "GM.listValues",
+      "GM.openInTab",
       "GM.xmlHttpRequest"
     ],
     "min": {
diff --git a/src/platform/$.coffee b/src/platform/$.coffee
index abc9c3c65..44c39168c 100644
--- a/src/platform/$.coffee
+++ b/src/platform/$.coffee
@@ -259,7 +259,9 @@ $.modifiedClick = (e) ->
 
 $.open = 
 <% if (type === 'userscript') { %>
-  if GM_openInTab?
+  if GM?.openInTab?
+    GM.openInTab
+  else if GM_openInTab?
     GM_openInTab
   else
     (url) -> window.open url, '_blank'