diff --git a/sbin/common/constants.sh b/sbin/common/constants.sh
index 1547c053c..ae395058f 100755
--- a/sbin/common/constants.sh
+++ b/sbin/common/constants.sh
@@ -18,12 +18,14 @@ export JDK8_VERSION="jdk8u";
 export JDK9_VERSION="jdk9u";
 export JDK10_VERSION="jdk10u";
 export JDK11_VERSION="jdk11u";
+export JDK12_VERSION="jdk12u";
 export JDKHEAD_VERSION="jdk";
 
 export JDK8_CORE_VERSION="jdk8";
 export JDK9_CORE_VERSION="jdk9";
 export JDK10_CORE_VERSION="jdk10";
 export JDK11_CORE_VERSION="jdk11";
+export JDK12_CORE_VERSION="jdk12";
 export JDKHEAD_CORE_VERSION="${JDKHEAD_VERSION}";
 export AMBER_CORE_VERSION="amber";