1 files changed, 2 insertions, 2 deletions
diff --git a/lib.c b/lib.c
index 9c3f1e34..cd15cd1b 100644
--- a/lib.c
+++ b/lib.c
@@ -373,7 +373,7 @@ val appendv(val lists)
 
   for (; lists; lists = cdr(lists)) {
     val item = car(lists);
-    if (listp(*ptail))
+    if (!listp(*ptail))
       uw_throwf(error_s, lit("append: ~s is not a list"), *ptail, nao);
     list_collect_append(ptail, item);
   }
@@ -2357,7 +2357,7 @@ val size_vec(val vec)
 
 val vector_list(val list)
 {
-  val vec = vector(0);
+  val vec = vector(zero);
  
   if (!listp(list))
     uw_throwf(error_s, lit("vector_list: list expected, not ~s"), list, nao);