diff --git a/mozilla/xpcom/build/Makefile.in b/mozilla/xpcom/build/Makefile.in
index 9aa83675768..b4fd574f124 100644
--- a/mozilla/xpcom/build/Makefile.in
+++ b/mozilla/xpcom/build/Makefile.in
@@ -55,7 +55,8 @@ LOCAL_INCLUDES	= \
 EXTRA_DSO_LDOPTS = \
 		$(MKSHLIB_FORCE_ALL) \
 		$(SHARED_LIBRARY_LIBS) \
-		$(MKSHLIB_UNFORCE_ALL)
+		$(MKSHLIB_UNFORCE_ALL) \
+		$(NULL)
 
 include $(topsrcdir)/config/rules.mk