--- a/mobile/installer/Makefile.in
+++ b/mobile/installer/Makefile.in
@@ -102,17 +102,17 @@ DEFINES += -DBINPATH=$(BINPATH)
 
 ifdef MOZ_PKG_MANIFEST_P
 MOZ_PKG_MANIFEST = package-manifest
 
 $(MOZ_PKG_MANIFEST): $(MOZ_PKG_MANIFEST_P) FORCE
 	$(PYTHON) $(topsrcdir)/config/Preprocessor.py $(DEFINES) $(ACDEFINES) $< > $@
 ifdef MOZ_CHROME_MULTILOCALE
 	printf "\n[multilocale]\n" >> $@
-	for LOCALE in $(MOZ_CHROME_MULTILOCALE) ;\
+	for LOCALE in en-US $(MOZ_CHROME_MULTILOCALE) ;\
 	do \
 	  printf "$(BINPATH)/chrome/$$LOCALE$(JAREXT)\n" >> $@; \
 	  printf "$(BINPATH)/chrome/$$LOCALE.manifest\n" >> $@; \
 	done
 endif
 
 GARBAGE += $(MOZ_PKG_MANIFEST)
 endif