1 files changed, 1 insertions, 1 deletions
diff --git a/pp_hot.c b/pp_hot.c
index f6caadb396..a3734c19cd 100644
--- a/pp_hot.c
+++ b/pp_hot.c
@@ -172,7 +172,7 @@ PP(pp_concat)
 	if (SvGMAGICAL(left))
 	    mg_get(left);		/* or mg_get(left) may happen here */
 	if (!SvOK(TARG))
-	    sv_setpv(left, "");
+	    sv_setpvn(left, "", 0);
 	(void)SvPV_nomg(left, llen);    /* Needed to set UTF8 flag */
 	lbyte = !DO_UTF8(left);
 	if (IN_BYTES)