--- a/langtools/src/jdk.compiler/share/classes/com/sun/tools/javac/code/Symbol.java	Mon Jan 30 15:08:38 2017 -0800
+++ b/langtools/src/jdk.compiler/share/classes/com/sun/tools/javac/code/Symbol.java	Mon Jan 30 17:43:18 2017 -0800
@@ -948,6 +948,11 @@
         }
 
         @Override @DefinedBy(Api.LANGUAGE_MODEL)
+        public boolean isOpen() {
+            return flags.contains(ModuleFlags.OPEN);
+        }
+
+        @Override @DefinedBy(Api.LANGUAGE_MODEL)
         public boolean isUnnamed() {
             return name.isEmpty() && owner == null;
         }