--- a/make/autoconf/version-numbers	Wed Jan 03 18:21:10 2018 -0800
+++ b/make/autoconf/version-numbers	Thu Jan 04 04:22:28 2018 +0000
@@ -30,6 +30,8 @@
 DEFAULT_VERSION_UPDATE=0
 DEFAULT_VERSION_PATCH=0
 DEFAULT_VERSION_DATE=2018-03-20
+DEFAULT_VERSION_CLASSFILE_MAJOR=55  # "`$EXPR $DEFAULT_VERSION_FEATURE + 44`"
+DEFAULT_VERSION_CLASSFILE_MINOR=0
 
 LAUNCHER_NAME=openjdk
 PRODUCT_NAME=OpenJDK