1 files changed, 1 insertions, 1 deletions
diff --git a/doop.c b/doop.c
index ffa1d1bbac..ea64ff8fb4 100644
--- a/doop.c
+++ b/doop.c
@@ -669,7 +669,7 @@ Perl_do_join(pTHX_ register SV *sv, SV *del, register SV **mark, register SV **s
 	++mark;
     }
 
-    sv_setpv(sv, "");
+    sv_setpvn(sv, "", 0);
     /* sv_setpv retains old UTF8ness [perl #24846] */
     if (SvUTF8(sv))
 	SvUTF8_off(sv);