diff --git a/fish/add-on.fish b/fish/add-on.fish
index afc4ea1..f366f59 100644
--- a/fish/add-on.fish
+++ b/fish/add-on.fish
@@ -111,6 +111,12 @@ function ls --description 'alias ls to eza with directory `.tldr` descriptions'
         return
     end
 
+    # 空目录直接返回：BSD seq（macOS）遇到 `seq 0` 会倒数输出 "1 0"，
+    # 导致下面用 $lines[0] 取值时报 "array indices start at 1"
+    if test (count $lines) -eq 0
+        return
+    end
+
     # 双路循环渲染
     for i in (seq (count $lines))
         set -l line $lines[$i]