diff -r 8c413497f434 -r 070d523b96a7 src/share/vm/runtime/signature.cpp
--- a/src/share/vm/runtime/signature.cpp	Fri Nov 09 22:22:53 2012 -0800
+++ b/src/share/vm/runtime/signature.cpp	Mon Nov 12 16:15:05 2012 -0500
@@ -354,7 +354,7 @@
     return Universe::java_mirror(type());
   Klass* klass = as_klass(class_loader, protection_domain, failure_mode, CHECK_NULL);
   if (klass == NULL)  return NULL;
-  return Klass::cast(klass)->java_mirror();
+  return klass->java_mirror();
 }
 
 Symbol* SignatureStream::as_symbol_or_null() {