diff --git a/enum.c b/enum.c
index fc49e96a3d..69e753ad1b 100644
--- a/enum.c
+++ b/enum.c
@@ -522,7 +522,7 @@ enum_to_a(int argc, VALUE *argv, VALUE obj)
 	ary = rb_ary_new();
     }
     else {
-	ary = rb_ary_new_capa(NUM2LONG(size));
+	ary = rb_ary_new2(NUM2LONG(size));
     }
 =======
     VALUE ary = rb_ary_new();