1 files changed, 1 insertions, 1 deletions
diff --git a/pp_sys.c b/pp_sys.c
index 5154b9baa8..4ae475d460 100644
--- a/pp_sys.c
+++ b/pp_sys.c
@@ -417,7 +417,7 @@ PP(pp_warn)
     }
     else if (SP == MARK) {
 	exsv = &PL_sv_no;
-	EXTEND(SP, 1);
+	MEXTEND(SP, 1);
 	SP = MARK + 1;
     }
     else {