diff --git a/docs/DESKTOP_ENVIRONMENTS.md b/docs/DESKTOP_ENVIRONMENTS.md
index a42efd6791..4f82ce7799 100644
--- a/docs/DESKTOP_ENVIRONMENTS.md
+++ b/docs/DESKTOP_ENVIRONMENTS.md
@@ -81,7 +81,10 @@ This has the following advantages:
    adjusted using desktop environment specific drop-in files.
 
  * The application ID can be retrieved by stripping the prefix and postfix.
-   This in turn should map to the corresponding `.desktop` file when available
+   This in turn should map to the corresponding `.desktop` file when available.
+
+   Note that this nameing scheme might be a unit alias, so runtime detection
+   must check the entire name-array of a unit, rather than just its unit ID.
 
 TODO: Define the name of slices that should be used.
 This could be `app-<launcher>-<ApplicationID>-<RANDOM>.slice`.