diff --git a/cli/generate/src/lib.rs b/cli/generate/src/lib.rs
index cfd2f94b..95bcb0a9 100644
--- a/cli/generate/src/lib.rs
+++ b/cli/generate/src/lib.rs
@@ -252,7 +252,7 @@ fn generate_parser_for_grammar_with_opts(
         &lexical_grammar,
         &simple_aliases,
         &variable_info,
-    );
+    )?;
     let supertype_symbol_map =
         node_types::get_supertype_symbol_map(&syntax_grammar, &simple_aliases, &variable_info);
     let tables = build_tables(