diff --git a/lib/v8/function.rb b/lib/v8/function.rb
index 173963f..5092b8a 100644
--- a/lib/v8/function.rb
+++ b/lib/v8/function.rb
@@ -16,7 +16,7 @@ module V8
     end
     
     def call(*args)
-      self.methodcall(@context.Global(), *args)
+      self.methodcall(@portal.context.native.Global(), *args)
     end
     
     def new(*args)
diff --git a/lib/v8/portal.rb b/lib/v8/portal.rb
index f22d1ad..42a2305 100644
--- a/lib/v8/portal.rb
+++ b/lib/v8/portal.rb
@@ -1,6 +1,7 @@
 
 module V8
   class Portal
+    attr_reader :context
 
     def initialize(context)
       @context = context