diff --git a/doc/manual/src/SUMMARY.md b/doc/manual/src/SUMMARY.md
index 98042ee9f..2cf28aa91 100644
--- a/doc/manual/src/SUMMARY.md
+++ b/doc/manual/src/SUMMARY.md
@@ -196,7 +196,7 @@
   - [C++ style guide](contributing/cxx.md)
 - [Release Notes](release-notes/release-notes.md)
   - [Upcoming release](release-notes/rl-next.md)
-  <!-- RELENG-AUTO-INSERTION-MARKER (see releng/release_notes.py) -->
+    <!-- RELENG-AUTO-INSERTION-MARKER (see releng/release_notes.py) -->
   - [Lix 2.90 (2024-07-10)](release-notes/rl-2.90.md)
   - [Nix 2.18 (2023-09-20)](release-notes/rl-2.18.md)
   - [Nix 2.17 (2023-07-24)](release-notes/rl-2.17.md)
diff --git a/releng/release_notes.py b/releng/release_notes.py
index 0861e8d4e..a7fd64b08 100644
--- a/releng/release_notes.py
+++ b/releng/release_notes.py
@@ -16,7 +16,7 @@ def add_to_summary(date: str):
     if VERSION_RL.exists():
         return
 
-    MARKER = '<!-- RELENG-AUTO-INSERTION-MARKER'
+    MARKER = '  <!-- RELENG-AUTO-INSERTION-MARKER'
 
     new_lines = []
     for line in SUMMARY.read_text().splitlines():