diff --git a/changelogs/fragments/reboot_missing_parameter.yaml b/changelogs/fragments/reboot_missing_parameter.yaml
new file mode 100644
index 00000000000..8048e059124
--- /dev/null
+++ b/changelogs/fragments/reboot_missing_parameter.yaml
@@ -0,0 +1,2 @@
+bugfixes:
+- reboot - add reboot_timeout parameter to the list of parameters so it can be used.
diff --git a/lib/ansible/plugins/action/reboot.py b/lib/ansible/plugins/action/reboot.py
index 19c8943dddc..af54d901eb2 100644
--- a/lib/ansible/plugins/action/reboot.py
+++ b/lib/ansible/plugins/action/reboot.py
@@ -28,7 +28,7 @@ class TimedOutException(Exception):
 
 class ActionModule(ActionBase):
     TRANSFERS_FILES = False
-    _VALID_ARGS = frozenset(('connect_timeout', 'msg', 'post_reboot_delay', 'pre_reboot_delay', 'test_command'))
+    _VALID_ARGS = frozenset(('connect_timeout', 'msg', 'post_reboot_delay', 'pre_reboot_delay', 'test_command', 'reboot_timeout'))
 
     DEFAULT_REBOOT_TIMEOUT = 600
     DEFAULT_CONNECT_TIMEOUT = None