diff --git a/grammar.ron b/src/grammar.ron
similarity index 100%
rename from grammar.ron
rename to src/grammar.ron
diff --git a/tools/src/bin/gen.rs b/tools/src/bin/gen.rs
index e772922baa..2d3cd422d3 100644
--- a/tools/src/bin/gen.rs
+++ b/tools/src/bin/gen.rs
@@ -100,7 +100,7 @@ impl Grammar {
 }
 
 fn grammar_file() -> PathBuf {
-    base_dir().join("grammar.ron")
+    base_dir().join("src/grammar.ron")
 }
 
 fn generated_file() -> PathBuf {