diff --git a/contrib/systemd/autorandr.service b/contrib/systemd/autorandr.service
index 74a78de..d270c5e 100644
--- a/contrib/systemd/autorandr.service
+++ b/contrib/systemd/autorandr.service
@@ -1,6 +1,9 @@
 [Unit]
 Description=autorandr execution hook
 After=sleep.target
+# Note: StartLimitInterval was renamed to StartLimitIntervalSec in systemd-230.
+# See autorandr bug #69. Do not rename for now, as the old name is kept for
+# compatibility.
 StartLimitInterval=5
 StartLimitBurst=1