diff --git a/mozilla/xpcom/ds/Makefile.in b/mozilla/xpcom/ds/Makefile.in
index 15c88b7cadb..051fdb900f5 100644
--- a/mozilla/xpcom/ds/Makefile.in
+++ b/mozilla/xpcom/ds/Makefile.in
@@ -106,6 +106,7 @@ XPIDLSRCS	= \
 		nsIObserverService.idl \
 		nsIProperties.idl \
 		nsISupportsArray.idl \
+		nsISupportsIterators.idl \
 		nsISupportsPrimitives.idl \
 		$(NULL)
 
diff --git a/mozilla/xpcom/ds/makefile.win b/mozilla/xpcom/ds/makefile.win
index 23b5f68e486..839bc6c375a 100644
--- a/mozilla/xpcom/ds/makefile.win
+++ b/mozilla/xpcom/ds/makefile.win
@@ -68,6 +68,7 @@ XPIDLSRCS =                         \
 	.\nsIObserverService.idl    \
         .\nsIProperties.idl         \
 	.\nsISupportsArray.idl	    \
+	.\nsISupportsIterators.idl  \
 	.\nsISupportsPrimitives.idl \
         $(NULL)