--- a/langtools/src/share/classes/com/sun/tools/javac/main/Main.java	Tue Nov 06 14:32:49 2012 -0800
+++ b/langtools/src/share/classes/com/sun/tools/javac/main/Main.java	Tue Nov 06 17:22:29 2012 -0800
@@ -533,7 +533,7 @@
      * annotation processor.
      */
     void apMessage(AnnotationProcessingError ex) {
-        log.printLines("msg.proc.annotation.uncaught.exception");
+        log.printLines(PrefixKind.JAVAC, "msg.proc.annotation.uncaught.exception");
         ex.getCause().printStackTrace(log.getWriter(WriterKind.NOTICE));
     }