diff --git a/allmakefiles.sh b/allmakefiles.sh
index 15a18f2b96a..239a1588c14 100755
--- a/allmakefiles.sh
+++ b/allmakefiles.sh
@@ -151,6 +151,7 @@ js/src/liveconnect/classes/Makefile
 # js/src/xpcom/Makefile
 js/src/xpconnect/Makefile
 js/src/xpconnect/public/Makefile
+js/src/xpconnect/idl/Makefile
 js/src/xpconnect/shell/Makefile
 js/src/xpconnect/src/Makefile
 js/src/xpconnect/tests/Makefile
diff --git a/js/src/xpconnect/idl/Makefile.in b/js/src/xpconnect/idl/Makefile.in
new file mode 100644
index 00000000000..e780c36bda3
--- /dev/null
+++ b/js/src/xpconnect/idl/Makefile.in
@@ -0,0 +1,33 @@
+#!gmake
+#
+# 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) 1999 Netscape Communications Corporation.  All Rights
+# Reserved.
+
+DEPTH		= ../../../..
+topsrcdir	= @top_srcdir@
+srcdir		= @srcdir@
+VPATH		= @srcdir@
+
+include $(DEPTH)/config/autoconf.mk
+
+MODULE = xpconnect
+
+XPIDLSRCS = \
+	xpccomponents.idl \
+	xpcjsid.idl \
+	xpctest.idl \
+	$(NULL)
+
+include $(topsrcdir)/config/rules.mk
diff --git a/js/src/xpconnect/idl/makefile.win b/js/src/xpconnect/idl/makefile.win
new file mode 100644
index 00000000000..b59d8e8aeb6
--- /dev/null
+++ b/js/src/xpconnect/idl/makefile.win
@@ -0,0 +1,28 @@
+#!gmake
+#
+# 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) 1999 Netscape Communications Corporation.  All Rights
+# Reserved.
+
+DEPTH=..\..\..\..
+
+MODULE=xpconnect
+
+XPIDLSRCS= .\xpccomponents.idl \
+           .\xpcjsid.idl \
+           .\xpctest.idl \
+           $(NULL)
+
+include <$(DEPTH)\config\rules.mak>
+
diff --git a/js/src/xpconnect/idl/nsISupports.idl b/js/src/xpconnect/idl/nsISupports.idl
deleted file mode 100644
index e69de29bb2d..00000000000
diff --git a/js/src/xpconnect/idl/nsrootidl.idl b/js/src/xpconnect/idl/nsrootidl.idl
deleted file mode 100644
index e69de29bb2d..00000000000