diff --git a/quirks/50-system-wareus.quirks b/quirks/50-system-wareus.quirks
index 7127d4c3..8a5bbabf 100644
--- a/quirks/50-system-wareus.quirks
+++ b/quirks/50-system-wareus.quirks
@@ -1,3 +1,5 @@
+# Do not edit this file, it will be overwritten on update
+
 # Clickpad that announces BTN_RIGHT
 [Wareus B15 Touchpad]
 MatchName=HTIX5288:00 36B6:C001 Touchpad
diff --git a/test/test_quirks_files.py b/test/test_quirks_files.py
index e828a48b..6b30ed34 100755
--- a/test/test_quirks_files.py
+++ b/test/test_quirks_files.py
@@ -44,6 +44,14 @@ def pytest_generate_tests(metafunc):
         metafunc.parametrize("quirksfile", [f for f in quirksdir().glob("*.quirks")])
 
 
+def test_has_modification_warning(quirksfile):
+    with open(quirksfile) as f:
+        first_line = f.readline().strip()
+    assert first_line == "# Do not edit this file, it will be overwritten on update", (
+        f"missing header in file {quirksfile}"
+    )
+
+
 def test_matches_are_valid(quirksfile):
     quirks = configparser.ConfigParser(strict=True)
     # Don't convert to lowercase