diff --git a/mozilla/toolkit/mozapps/installer/packager.mk b/mozilla/toolkit/mozapps/installer/packager.mk
index 723c6fcb325..cacd8beec4f 100644
--- a/mozilla/toolkit/mozapps/installer/packager.mk
+++ b/mozilla/toolkit/mozapps/installer/packager.mk
@@ -315,10 +315,12 @@ endif
 		"$(DEPTH)/installer-stage/localized", \
 		"$(MOZ_PKG_MANIFEST)", "$(PKGCP_OS)", 1, 0, 1 \
 		$(foreach pkg,$(MOZ_LOCALIZED_PKG_LIST),$(PKG_ARG)) )
+ifdef MOZ_OPTIONAL_PKG_LIST
 	$(call PACKAGER_COPY, "$(DIST)",\
 		"$(DEPTH)/installer-stage/optional", \
 		"$(MOZ_PKG_MANIFEST)", "$(PKGCP_OS)", 1, 0, 1 \
 		$(foreach pkg,$(MOZ_OPTIONAL_PKG_LIST),$(PKG_ARG)) )
+endif
 	$(PERL) $(topsrcdir)/xpinstall/packager/xptlink.pl -s $(DIST) -d $(DIST)/xpt -f $(DEPTH)/installer-stage/nonlocalized/components -v -x "$(XPIDL_LINK)"
 
 stage-package: $(MOZ_PKG_MANIFEST) $(MOZ_PKG_REMOVALS_GEN)