diff --git a/IPython/Extensions/ibrowse.py b/IPython/Extensions/ibrowse.py
index e211e39..bcd693d 100644
--- a/IPython/Extensions/ibrowse.py
+++ b/IPython/Extensions/ibrowse.py
@@ -796,12 +796,16 @@ class ibrowse(ipipe.Display):
     keymap.register("refresh", "r")
     keymap.register("refreshfind", "R")
 
-    def __init__(self, *attrs):
+    def __init__(self, input=None, attrs=None):
         """
         Create a new browser. If ``attrs`` is not empty, it is the list
         of attributes that will be displayed in the browser, otherwise
         these will be determined by the objects on screen.
         """
+        self.input = input
+
+        if attrs is None:
+            attrs = ()
         self.attrs = attrs
 
         # Stack of browser levels
diff --git a/IPython/Extensions/igrid.py b/IPython/Extensions/igrid.py
index 007f3fe..3b50286 100644
--- a/IPython/Extensions/igrid.py
+++ b/IPython/Extensions/igrid.py
@@ -1101,6 +1101,10 @@ class igrid(ipipe.Display):
     This is a wx-based display object that can be used instead of ``ibrowse``
     (which is curses-based) or ``idump`` (which simply does a print).
     """
+
+    def __init__(self, input=None):
+        self.input = input
+
     if wx.VERSION < (2, 7):
         def display(self):
             try: