diff --git a/scripts/lint_grammar.py b/scripts/lint_grammar.py
index 1b08f22..192cde8 100644
--- a/scripts/lint_grammar.py
+++ b/scripts/lint_grammar.py
@@ -7,6 +7,9 @@
 
 Usage:
     python scripts/lint_grammar.py [path/to/fasmg.tmLanguage.json]
+
+When no path is provided, lint the generated TextMate grammar under `dist/`,
+matching `scripts/gen_all.py --lint`.
 """
 from __future__ import annotations
 
@@ -16,7 +19,7 @@
 from pathlib import Path
 
 HERE = Path(__file__).resolve().parent
-DEFAULT_GRAMMAR = HERE.parent / "fasmg.tmLanguage.json"
+DEFAULT_GRAMMAR = HERE.parent / "dist" / "fasmg.tmLanguage.json"
 
 # Keys in the grammar JSON that contain regex strings.
 REGEX_KEYS = {"match", "begin", "end"}