diff --git a/README.md b/README.md
index 50099a2e8f4dc510e47afd9f46a64bd3eca58055..4f0e525d9c2866f5a511e7505fd9e10bf23c938c 100644
--- a/README.md
+++ b/README.md
@@ -295,7 +295,7 @@ transfer()
     local curl_output
     local awk_output
 
-    du --total --block-size="K" --dereference "${file_array[@]}" >&2
+    du -c -k -L "${file_array[@]}" >&2
     # be compatible with "bash"
     if [[ "${ZSH_NAME}" == "zsh" ]]
     then