diff --git a/toolkit/locales/l10n.mk b/toolkit/locales/l10n.mk
index 708a1d288e88..5f54b9efa013 100644
--- a/toolkit/locales/l10n.mk
+++ b/toolkit/locales/l10n.mk
@@ -184,12 +184,12 @@ ifndef WGET
 	$(error Wget not installed)
 endif
 	$(NSINSTALL) -D $(_ABS_DIST)/$(PKG_PATH)
-	(cd $(_ABS_DIST)/$(PKG_PATH) && $(WGET) -nv -N  "$(EN_US_BINARY_URL)/$(PACKAGE)")
+	(cd $(_ABS_DIST)/$(PKG_PATH) && $(WGET) --no-cache -nv -N  "$(EN_US_BINARY_URL)/$(PACKAGE)")
 	@echo "Downloaded $(EN_US_BINARY_URL)/$(PACKAGE) to $(_ABS_DIST)/$(PKG_PATH)/$(PACKAGE)"
 ifdef RETRIEVE_WINDOWS_INSTALLER
 ifeq ($(OS_ARCH), WINNT)
 	$(NSINSTALL) -D $(_ABS_DIST)/$(PKG_INST_PATH)
-	(cd $(_ABS_DIST)/$(PKG_INST_PATH) && $(WGET) -nv -N "$(EN_US_BINARY_URL)/$(PKG_PATH)$(PKG_INST_BASENAME).exe")
+	(cd $(_ABS_DIST)/$(PKG_INST_PATH) && $(WGET) --no-cache -nv -N "$(EN_US_BINARY_URL)/$(PKG_PATH)$(PKG_INST_BASENAME).exe")
 	@echo "Downloaded $(EN_US_BINARY_URL)/$(PKG_PATH)$(PKG_INST_BASENAME).exe to $(_ABS_DIST)/$(PKG_INST_PATH)$(PKG_INST_BASENAME).exe"
 endif
 endif