diff -r 9db4cc815ebc -r 241d082d6d89 src/Types.h
--- a/src/Types.h	Sun Jan 06 13:56:56 2013 -0800
+++ b/src/Types.h	Sat Jan 12 16:13:46 2013 -0800
@@ -377,7 +377,7 @@
         assert(isStruct());
         return fields_;
     }
-    Descriptor *lookupField(Handle<String> name, unsigned *index = NULL);
+    Descriptor *lookupField(String *name, unsigned *index = NULL);
 
     // Objects of this type can be created with this cached map.
     StructMap *newMap() {