1 files changed, 1 insertions, 1 deletions
diff --git a/sv.h b/sv.h
index 9d0851c084..960a0592aa 100644
--- a/sv.h
+++ b/sv.h
@@ -1761,7 +1761,7 @@ Like C<sv_catsv> but doesn't process magic.
 #define sv_catpvn_utf8_upgrade(dsv, sstr, slen, nsv)	\
 	STMT_START {					\
 	    if (!(nsv))					\
-		nsv = sv_2mortal(newSVpvn(sstr, slen));	\
+		nsv = newSVpvn_flags(sstr, slen, SVs_TEMP);	\
 	    else					\
 		sv_setpvn(nsv, sstr, slen);		\
 	    SvUTF8_off(nsv);				\