--- JSON-XS/XS.xs	2008/09/22 07:29:29	1.92
+++ JSON-XS/XS.xs	2008/09/29 03:09:27	1.93
@@ -196,7 +196,7 @@
 {
   if (expect_false (enc->cur + len >= enc->end))
     {
-      STRLEN cur = enc->cur - SvPVX (enc->sv);
+      STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);
       SvGROW (enc->sv, cur + len + 1);
       enc->cur = SvPVX (enc->sv) + cur;
       enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;