diff --git a/toolkit/mozapps/installer/package-name.mk b/toolkit/mozapps/installer/package-name.mk
index 3ddca0918da2..2d13d9bbc4ab 100644
--- a/toolkit/mozapps/installer/package-name.mk
+++ b/toolkit/mozapps/installer/package-name.mk
@@ -129,13 +129,14 @@ PKG_INST_BASENAME = $(MOZ_PKG_APPNAME_LC)-setup-$(MOZ_PKG_VERSION)
 endif
 endif
 PKG_PATH = $(MOZ_PKG_PLATFORM)/$(AB_CD)/
+CHECKSUMS_FILE_BASENAME = $(MOZ_PKG_APPNAME_LC)-$(MOZ_PKG_VERSION)
 ifeq ($(MOZ_APP_NAME),xulrunner)
 PKG_PATH = runtimes/
 PKG_BASENAME = $(MOZ_APP_NAME)-$(MOZ_PKG_VERSION).$(AB_CD).$(MOZ_PKG_PLATFORM)
+CHECKSUMS_FILE_BASENAME = $(PKG_BASENAME)
 endif
 PKG_INST_PATH = $(PKG_PATH)
 PKG_UPDATE_BASENAME = $(MOZ_PKG_APPNAME_LC)-$(MOZ_PKG_VERSION)
-CHECKSUMS_FILE_BASENAME = $(MOZ_PKG_APPNAME_LC)-$(MOZ_PKG_VERSION)
 PKG_UPDATE_PATH = update/$(PKG_PATH)
 COMPLETE_MAR = $(PKG_UPDATE_PATH)$(PKG_UPDATE_BASENAME).complete.mar
 # PARTIAL_MAR needs to be processed by $(wildcard) before you use it.