Index: src/packout.c
===================================================================
--- src/packout.c	(revision 37083)
+++ src/packout.c	(working copy)
@@ -226,7 +226,7 @@
     GETATTR_Key_num_key(interp, key, key_num);
 
     for (i = 0; i < ct->const_count; i++) {
-        if (type == PFC_STRING && ct->constants[i]->u.string == key_str)
+        if (type == PFC_STRING && Parrot_str_equal(interp, ct->constants[i]->u.string, key_str))
             return i;
         if (type == PFC_NUMBER && ct->constants[i]->u.number == key_num)
             return i;