Index: tls/vortex_tls.c
===================================================================
--- tls/vortex_tls.c	(revision 715)
+++ tls/vortex_tls.c	(working copy)
@@ -2112,7 +2112,7 @@
 	/* translate value returned into an octal representation */
 	for (iterator = 0; iterator < md_len; iterator++) {
 #if defined(AXL_OS_WIN32) && ! defined(__GNUC__)
-		sprintf_s (result + (iterator * 3), (md_len * 3), "%02X%s", 
+		sprintf_s (result + (iterator * 3), (md_len - iterator) * 3, "%02X%s", 
 			       buffer [iterator], 
 			       (iterator + 1 != md_len) ? ":" : "");
 #else