--- old/src/jdk.compiler/share/classes/com/sun/tools/javac/code/Lint.java	2017-10-11 09:55:31.161017403 -0700
+++ new/src/jdk.compiler/share/classes/com/sun/tools/javac/code/Lint.java	2017-10-11 09:55:30.693017386 -0700
@@ -122,6 +122,7 @@
             values.add(LintCategory.OPENS);
             values.add(LintCategory.MODULE);
             values.add(LintCategory.REMOVAL);
+            values.add(LintCategory.FUTURE);
         }
 
         // Look for specific overrides
@@ -285,6 +286,12 @@
         UNCHECKED("unchecked"),
 
         /**
+         * Warn about source structures that may be illegal or
+         * questionable in future source versions.
+         */
+        FUTURE("future"),
+
+        /**
          * Warn about potentially unsafe vararg methods
          */
         VARARGS("varargs");