diff --git a/mozilla/intl/strres/public/Makefile.in b/mozilla/intl/strres/public/Makefile.in
index d46c8021fbe..6c8f1c1e316 100644
--- a/mozilla/intl/strres/public/Makefile.in
+++ b/mozilla/intl/strres/public/Makefile.in
@@ -28,7 +28,7 @@ include $(DEPTH)/config/autoconf.mk
 
 MODULE		= intl
 
-XPIDLSRCS	= nsIStringBundle.idl
+XPIDLSRCS	= nsIStringBundle.idl nsIAcceptLang.idl
 
 include $(topsrcdir)/config/rules.mk