--- JSON-XS/XS.xs	2007/04/11 12:23:02	1.28
+++ JSON-XS/XS.xs	2007/05/09 15:34:04	1.29
@@ -984,6 +984,7 @@
   dec_t dec;
   SV *sv;
 
+  SvGETMAGIC (string);
   SvUPGRADE (string, SVt_PV);
 
   if (flags & F_UTF8)