--- old/src/jdk.compiler/share/classes/com/sun/tools/javac/code/Lint.java	2020-08-13 16:19:22.231000000 -0700
+++ new/src/jdk.compiler/share/classes/com/sun/tools/javac/code/Lint.java	2020-08-13 16:19:21.595000000 -0700
@@ -211,6 +211,11 @@
         FINALLY("finally"),
 
         /**
+          * Warn about compiler generation of a default constructor.
+          */
+        MISSING_DECLARED_CTOR("missing-declared-ctor"),
+
+        /**
          * Warn about module system related issues.
          */
         MODULE("module"),