diff --git a/doc/03-monitoring-basics.md b/doc/03-monitoring-basics.md
index 06ea0c166aa..1124d1b4cbb 100644
--- a/doc/03-monitoring-basics.md
+++ b/doc/03-monitoring-basics.md
@@ -2135,7 +2135,7 @@ In order to find out about the command argument, call the plugin's help
 or consult the README.
 
 ```
-./check_systemd.py --help
+./check_systemd --help
 
 ...
 
@@ -2194,7 +2194,7 @@ With the [example above](03-monitoring-basics.md#command-arguments-value),
 inspect the parameter's help text.
 
 ```
-./check_systemd.py --help
+./check_systemd --help
 
 ...
 
diff --git a/doc/05-service-monitoring.md b/doc/05-service-monitoring.md
index 097fb118476..9f188132b46 100644
--- a/doc/05-service-monitoring.md
+++ b/doc/05-service-monitoring.md
@@ -281,10 +281,10 @@ that [it works](05-service-monitoring.md#service-monitoring-plugins-it-works). T
 `--help` parameter to see the actual parameters (docs might be outdated).
 
 ```
-./check_systemd.py --help
+./check_systemd --help
 
-usage: check_systemd.py [-h] [-c SECONDS] [-e UNIT | -u UNIT] [-v] [-V]
-                        [-w SECONDS]
+usage: check_systemd [-h] [-c SECONDS] [-e UNIT | -u UNIT] [-v] [-V]
+                     [-w SECONDS]
 
 ...
 
@@ -319,7 +319,7 @@ Start with the basic plugin call without any parameters.
 
 ```
 object CheckCommand "systemd" { // Plugin name without 'check_' prefix
-  command = [ PluginContribDir + "/check_systemd.py" ] // Use the 'PluginContribDir' constant, see the contributed ITL commands
+  command = [ PluginContribDir + "/check_systemd" ] // Use the 'PluginContribDir' constant, see the contributed ITL commands
 }
 ```
 
diff --git a/doc/10-icinga-template-library.md b/doc/10-icinga-template-library.md
index 40cafba19fd..f1abee76922 100644
--- a/doc/10-icinga-template-library.md
+++ b/doc/10-icinga-template-library.md
@@ -3652,7 +3652,7 @@ iostat\_cwrite | **Required.** Critical threshold for KB/s writes (default: 200)
 
 #### systemd <a id="plugin-contrib-command-systemd"></a>
 
-The [check_systemd.py](https://github.com/Josef-Friedrich/check_systemd) plugin
+The [check_systemd](https://github.com/Josef-Friedrich/check_systemd) plugin
 will report a degraded system to your monitoring solution. It requires only the [nagiosplugin](https://nagiosplugin.readthedocs.io/en/stable) library.
 
 Custom variables passed as [command parameters](03-monitoring-basics.md#command-passing-parameters):
diff --git a/itl/plugins-contrib.d/systemd.conf b/itl/plugins-contrib.d/systemd.conf
index 4c0bbca1705..236499bc45e 100644
--- a/itl/plugins-contrib.d/systemd.conf
+++ b/itl/plugins-contrib.d/systemd.conf
@@ -1,7 +1,7 @@
 /* Icinga 2 | (c) 2012 Icinga GmbH | GPLv2+ */
 
 object CheckCommand "systemd" {
-	command = [ PluginContribDir + "/check_systemd.py" ]
+	command = [ PluginContribDir + "/check_systemd" ]
 
 	arguments = {
 		"--unit" = {