--- a/langtools/src/jdk.compiler/share/classes/com/sun/tools/javac/comp/Annotate.java	Tue Aug 26 12:45:28 2014 +0100
+++ b/langtools/src/jdk.compiler/share/classes/com/sun/tools/javac/comp/Annotate.java	Wed Aug 27 07:44:00 2014 +0200
@@ -34,6 +34,7 @@
 import javax.tools.JavaFileObject;
 
 import com.sun.tools.javac.util.*;
+import com.sun.tools.javac.util.DefinedBy.Api;
 import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition;
 import com.sun.tools.javac.code.*;
 import com.sun.tools.javac.code.Symbol.*;
@@ -243,7 +244,7 @@
             this.on = on;
         }
 
-        @Override
+        @Override @DefinedBy(Api.LANGUAGE_MODEL)
         public String toString() {
             return "<placeholder: " + placeholderFor + " on: " + on + ">";
     }