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

@@ -114,11 +114,12 @@
         V51(51, 0),   // JDK 1.7
         V52(52, 0),   // JDK 1.8: lambda, type annos, param names
         V53(53, 0),   // JDK 1.9: modules, indy string concat
         V54(54, 0),   // JDK 10
         V55(55, 0),   // JDK 11: constant dynamic, nest mates
-        V56(56, 0);   // JDK 12
+        V56(56, 0),   // JDK 12
+        V57(57, 0);   // JDK 13
         Version(int major, int minor) {
             this.major = major;
             this.minor = minor;
         }
         public final int major, minor;