--- old/src/jdk.compiler/share/classes/com/sun/tools/javac/resources/javac.properties	2020-07-31 14:04:36.213167000 -0700
+++ new/src/jdk.compiler/share/classes/com/sun/tools/javac/resources/javac.properties	2020-07-31 14:04:35.573167000 -0700
@@ -182,6 +182,9 @@
 javac.opt.Xlint.desc.classfile=\
     Warn about issues related to classfile contents.
 
+javac.opt.Xlint.desc.missing-declared-ctor=\
+    Warn about missing declared constructors in public classes in exported packages.
+
 javac.opt.Xlint.desc.deprecation=\
     Warn about use of deprecated items.