diff --git a/build/mac/NGLayoutBuildList.pm b/build/mac/NGLayoutBuildList.pm
index 5b5facb75b4..0f53f919000 100644
--- a/build/mac/NGLayoutBuildList.pm
+++ b/build/mac/NGLayoutBuildList.pm
@@ -334,6 +334,7 @@ sub BuildClientDist()
 
 	#LOCALE
 	_InstallFromManifest(":mozilla:intl:locale:public:MANIFEST",						"$distdirectory:locale:");
+	_InstallFromManifest(":mozilla:intl:locale:public:MANIFEST_IDL",			"$distdirectory:idl:");
 
 	#LWBRK
 	_InstallFromManifest(":mozilla:intl:lwbrk:public:MANIFEST",						"$distdirectory:lwbrk:");
@@ -782,6 +783,8 @@ sub BuildIDLProjects()
 
 	BuildIDLProject(":mozilla:caps:macbuild:CapsIDL.mcp",							"caps");
 
+	BuildIDLProject(":mozilla:intl:locale:macbuild:nsLocaleIDL.mcp",					"nsLocale");
+
 	print("--- IDL projects complete ----\n")
 }
 
diff --git a/intl/locale/public/Makefile.in b/intl/locale/public/Makefile.in
index 091029991fa..1e6d684da24 100644
--- a/intl/locale/public/Makefile.in
+++ b/intl/locale/public/Makefile.in
@@ -21,12 +21,16 @@ srcdir		= @srcdir@
 
 include $(DEPTH)/config/autoconf.mk
 
+MODULE = locale
+
+XPIDLSRCS       = nsILocale.idl  \
+                  $(NULL)
+
 EXPORTS = \
 	nsCollationCID.h 	\
 	nsDateTimeFormatCID.h 	\
 	nsICollation.h 		\
 	nsIDateTimeFormat.h 	\
-	nsILocale.h		\
 	nsILocaleFactory.h	\
 	nsIPosixLocale.h	\
 	nsLocaleCID.h		\
diff --git a/intl/locale/public/makefile.win b/intl/locale/public/makefile.win
index 1406b9e8ef1..aa5ef99fdc5 100644
--- a/intl/locale/public/makefile.win
+++ b/intl/locale/public/makefile.win
@@ -21,12 +21,16 @@ MODULE=locale
 
 DEPTH=..\..\..
 
+XPIDLSRCS =                     \
+            .\nsILocale.idl     \
+            $(NULL)
+
+
 EXPORTS=\
     nsCollationCID.h           \
 	nsDateTimeFormatCID.h      \
 	nsICollation.h				\
 	nsIDateTimeFormat.h			\
-	nsILocale.h					\
 	nsILocaleFactory.h			\
 	nsLocaleCID.h				\
 	nsIWin32Locale.h			\