--- a/langtools/src/jdk.compiler/share/classes/com/sun/tools/javac/code/Symtab.java	Tue Aug 26 12:45:28 2014 +0100
+++ b/langtools/src/jdk.compiler/share/classes/com/sun/tools/javac/code/Symtab.java	Wed Aug 27 07:44:00 2014 +0200
@@ -55,6 +55,8 @@
 import com.sun.tools.javac.util.Assert;
 import com.sun.tools.javac.util.Context;
 import com.sun.tools.javac.util.Convert;
+import com.sun.tools.javac.util.DefinedBy;
+import com.sun.tools.javac.util.DefinedBy.Api;
 import com.sun.tools.javac.util.JavacMessages;
 import com.sun.tools.javac.util.List;
 import com.sun.tools.javac.util.Log;
@@ -425,6 +427,7 @@
                 }
             };
         noSymbol = new TypeSymbol(Kinds.NIL, 0, names.empty, Type.noType, rootPackage) {
+            @DefinedBy(Api.LANGUAGE_MODEL)
             public <R, P> R accept(ElementVisitor<R, P> v, P p) {
                 return v.visitUnknown(this, p);
             }