diff --git a/mozilla/modules/plugin/samples/default/windows/Makefile.in b/mozilla/modules/plugin/samples/default/windows/Makefile.in
index dc8718edc3d..5beffc40140 100644
--- a/mozilla/modules/plugin/samples/default/windows/Makefile.in
+++ b/mozilla/modules/plugin/samples/default/windows/Makefile.in
@@ -30,7 +30,11 @@ MODULE		= plugin
 LIBRARY_NAME	= npnul32
 RESFILE		= npnul32.res
 DEFFILE		= $(srcdir)/npnul32.def
-REQUIRES	= java plugin
+REQUIRES	= java \
+                  plugin \
+                  xpcom \
+                  pref \
+                  $(NULL)
 
 CPPSRCS		= \
 		maindll.cpp \