diff --git a/mozilla/xpfe/components/makefile.win b/mozilla/xpfe/components/makefile.win
index 226357f950f..550ebdc472a 100644
--- a/mozilla/xpfe/components/makefile.win
+++ b/mozilla/xpfe/components/makefile.win
@@ -17,6 +17,6 @@
 
 DEPTH=..\..
 
-DIRS= public find history related ucth xfer 
+DIRS= public find history prefwindow related ucth xfer 
 
 include <$(DEPTH)\config\rules.mak>