diff --git a/Changes b/Changes
index fbaa0664a..4ed5f6816 100644
--- a/Changes
+++ b/Changes
@@ -83,6 +83,7 @@ packaging:
   - libxml2 2.13.5
   - libiconv 1.18
 * Update MacOSX packages to use OpenSSL 3.4.0
+* fix #816: Support --delaytime option in linux perl installer
 
 1.11 Tue, 24 Sep 2024
 
diff --git a/contrib/unix/installer/Getopt.pm b/contrib/unix/installer/Getopt.pm
index 4b4a8df36..d9b6c9b75 100644
--- a/contrib/unix/installer/Getopt.pm
+++ b/contrib/unix/installer/Getopt.pm
@@ -15,6 +15,7 @@ my @options = (
     'color',
     'cron=i',
     'debug|d=i',
+    'delaytime=i',
     'distro=s',
     'no-question|Q',
     'extract=s',
@@ -119,6 +120,10 @@ glpi-agent-linux-installer [options]
     -s --server=URI                configure agent GLPI server
     -l --local=PATH                configure local path to store inventories
 
+  Target scheduling options:
+    --delaytime=LIMIT              maximum delay before target tasks first run, in seconds (3600)
+                                   It also defines the maximum delay on network error.
+
   Task selection options:
     --no-task=TASK[,TASK]...       configure task to not run
     --tasks=TASK1[,TASK]...[,...]  configure tasks to run in a given order