diff --git a/README.md b/README.md
index 63f6c730..ee214fb3 100644
--- a/README.md
+++ b/README.md
@@ -255,6 +255,7 @@ Usage
                                   only available on Linux kernel > 3.7.0
 
        [--acl <acl_file>]         config file of ACL (Access Control List)
+                                  only available in local mode
 
        [-v]                       verbose mode
 
diff --git a/src/utils.c b/src/utils.c
index a9f1357c..0697c2a6 100644
--- a/src/utils.c
+++ b/src/utils.c
@@ -263,6 +263,8 @@ void usage()
     printf("\n");
     printf(
         "       [--acl <acl_file>]         config file of ACL (Access Control List)\n");
+    printf(
+        "                                  only available in local mode\n");
     printf("\n");
     printf(
         "       [-v]                       verbose mode\n");