diff --git a/README.md b/README.md
index c1d3fba..9f3337a 100644
--- a/README.md
+++ b/README.md
@@ -163,6 +163,9 @@ Build packages are stored in a cache `/var/cache/decman`. By default decman keep
 
 ### Systemd units
 
+> [!NOTE]
+> Decman will only enable and disable systemd systemd. It will not start or stop them.
+
 Decman can enable systemd services, system wide or for a specific user. Decman will enable all units defined in the source, and disable them when they are removed from the source. If a unit is not defined in the source, decman will not touch it.
 
 ### Files
diff --git a/src/decman/app.py b/src/decman/app.py
index c167441..5486122 100644
--- a/src/decman/app.py
+++ b/src/decman/app.py
@@ -218,6 +218,9 @@ class Core:
     def _disable_units(self):
         to_disable = self.source.units_to_disable(self.store)
         l.print_list("Disabling systemd units:", to_disable)
+        if to_disable:
+            l.print_info(
+                "Disabled systemd units won't be stopped automatically.")
         if not self.only_print:
             self.systemctl.disable_units(to_disable)
 
@@ -286,6 +289,9 @@ class Core:
     def _enable_units(self):
         to_enable = self.source.units_to_enable(self.store)
         l.print_list("Enabling systemd units:", to_enable)
+        if to_enable:
+            l.print_info(
+                "Enabled systemd units won't be started automatically.")
         if not self.only_print:
             self.systemctl.enable_units(to_enable)