src/jdk.compiler/share/classes/com/sun/tools/javac/jvm/Target.java

@@ -68,11 +68,14 @@
 
     /** JDK 11. */
     JDK1_11("11", 55, 0),
 
     /** JDK 12. */
-    JDK1_12("12", 56, 0);
+    JDK1_12("12", 56, 0),
+
+    /** JDK 13. */
+    JDK1_13("13", 57, 0);
 
     private static final Context.Key<Target> targetKey = new Context.Key<>();
 
     public static Target instance(Context context) {
         Target instance = context.get(targetKey);