diff --git a/mailnews/news/public/Makefile.in b/mailnews/news/public/Makefile.in
index e18d4dc5a63..5af55316137 100644
--- a/mailnews/news/public/Makefile.in
+++ b/mailnews/news/public/Makefile.in
@@ -23,6 +23,7 @@ srcdir		= @srcdir@
 include $(DEPTH)/config/autoconf.mk
 
 EXPORTS= \
+		nsINNTPCategory.h \
 		nsINNTPNewsgroupList.h \
 		nsINNTPHost.h \
 		nsINNTPNewsgroup.h \
diff --git a/mailnews/news/public/nsINNTPCategory.h b/mailnews/news/public/nsINNTPCategory.h
new file mode 100644
index 00000000000..dd6bfd7fef9
--- /dev/null
+++ b/mailnews/news/public/nsINNTPCategory.h
@@ -0,0 +1,37 @@
+/*
+ * DO NOT EDIT.  THIS FILE IS GENERATED FROM nsINNTPCategory.idl
+ */
+
+#ifndef __gen_nsINNTPCategory_h__
+#define __gen_nsINNTPCategory_h__
+
+#include "nsISupports.h" /* interface nsISupports */
+#include "nsINNTPNewsgroup.h" /* interface nsINNTPNewsgroup */
+#include "nsIMsgGroupRecord.h" /* interface nsIMsgGroupRecord */
+
+
+/* starting interface nsINNTPCategory */
+class nsINNTPCategory : public nsISupports {
+ private:
+  void operator delete(void *); // NOT TO BE IMPLEMENTED
+
+ public: 
+  static const nsIID& IID() {
+    static nsIID iid = NS_INNTPCATEGORY_IID;
+    return iid;
+  }
+
+  /*  <IDL>  */
+  NS_IMETHOD BuildCategoryTree(const nsINNTPNewsgroup *parent, const char *catName, const nsIMsgGroupRecord *group, PRInt16 depth, nsINNTPNewsgroup **_retval) = 0;
+
+  /*  <IDL>  */
+  NS_IMETHOD AddToCategoryTree(const nsINNTPNewsgroup *parent, const char *groupName, const nsIMsgGroupRecord *group, nsINNTPNewsgroup **_retval) = 0;
+
+  /*  <IDL>  */
+  NS_IMETHOD CloneIntoNewsFolder(nsINNTPNewsgroup **_retval) = 0;
+
+  /*  <IDL>  */
+  NS_IMETHOD GetRootCategory(nsINNTPNewsgroup **_retval) = 0;
+};
+
+#endif /* __gen_nsINNTPCategory_h__ */
diff --git a/mailnews/news/public/nsINNTPCategory.idl b/mailnews/news/public/nsINNTPCategory.idl
new file mode 100644
index 00000000000..277b47149f6
--- /dev/null
+++ b/mailnews/news/public/nsINNTPCategory.idl
@@ -0,0 +1,36 @@
+/* -*- Mode: IDL; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ *
+ * The contents of this file are subject to the Netscape Public License
+ * Version 1.0 (the "NPL"); you may not use this file except in
+ * compliance with the NPL.  You may obtain a copy of the NPL at
+ * http://www.mozilla.org/NPL/
+ *
+ * Software distributed under the NPL is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
+ * for the specific language governing rights and limitations under the
+ * NPL.
+ *
+ * The Initial Developer of this code under the NPL is Netscape
+ * Communications Corporation.  Portions created by Netscape are
+ * Copyright (C) 1998 Netscape Communications Corporation.  All Rights
+ * Reserved.
+ */
+
+#include "nsISupports.idl"
+#include "nsIMsgGroupRecord.idl"
+#include "nsINNTPNewsgroup.idl"
+
+interface nsINNTPCategory : nsISupports {
+    nsINNTPNewsgroup BuildCategoryTree(in nsINNTPNewsgroup parent,
+                                       in string catName,
+                                       in nsIMsgGroupRecord group,
+                                       in short depth);
+    
+    nsINNTPNewsgroup AddToCategoryTree(in nsINNTPNewsgroup parent,
+                                       in string groupName,
+                                       in nsIMsgGroupRecord group);
+    
+    nsINNTPNewsgroup CloneIntoNewsFolder();
+    nsINNTPNewsgroup GetRootCategory();
+};
+