diff --git a/docshell/base/nsIDocShellHistory.idl b/docshell/base/nsIDocShellHistory.idl
new file mode 100644
index 000000000000..4d7244caeb06
--- /dev/null
+++ b/docshell/base/nsIDocShellHistory.idl
@@ -0,0 +1,43 @@
+/* -*- Mode: IDL; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ *
+ * The contents of this file are subject to the Mozilla Public
+ * License Version 1.1 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.mozilla.org/MPL/
+ * 
+ * Software distributed under the License is distributed on an "AS
+ * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+ * implied. See the License for the specific language governing
+ * rights and limitations under the License.
+ * 
+ * The Original Code is the Mozilla browser.
+ * 
+ * The Initial Developer of the Original Code is Netscape
+ * Communications, Inc.  Portions created by Netscape are
+ * Copyright (C) 1999, Mozilla.  All Rights Reserved.
+ * 
+ * Contributor(s):
+ */
+
+#include "nsISupports.idl"
+interface nsISHEntry;
+
+
+
+[scriptable, uuid(bd0a9ac0-4d3d-11d4-9bb1-00e09872a416)]
+interface nsIDocShellHistory : nsISupports
+{
+  /**
+   * Get the SHEntry associated with a child docshell
+   */
+  nsISHEntry GetChildSHEntry(in long aChildOffset);
+
+  /**
+   * Add a Child SHEntry for a frameset page
+   */
+  void AddChildSHEntry(in nsISHEntry aCloneReference,
+                       in nsISHEntry aHistoryEntry,
+                       in long aChildOffset);
+
+};
+