diff --git a/changelogs/fragments/169_add_lineseparator_to_command.yml b/changelogs/fragments/169_add_lineseparator_to_command.yml
new file mode 100644
index 0000000..9497ba5
--- /dev/null
+++ b/changelogs/fragments/169_add_lineseparator_to_command.yml
@@ -0,0 +1,3 @@
+---
+bugfixes:
+  - at - append line-separator to the end of the ``command`` (https://github.com/ansible-collections/ansible.posix/issues/169).
diff --git a/plugins/modules/at.py b/plugins/modules/at.py
index b29b35e..a35ec4e 100644
--- a/plugins/modules/at.py
+++ b/plugins/modules/at.py
@@ -129,7 +129,7 @@ def get_matching_jobs(module, at_cmd, script_file):
 def create_tempfile(command):
     filed, script_file = tempfile.mkstemp(prefix='at')
     fileh = os.fdopen(filed, 'w')
-    fileh.write(command)
+    fileh.write(command + os.linesep)
     fileh.close()
     return script_file