diff --git a/lang/semgrep-grammars/src/semgrep-cpp/grammar.js b/lang/semgrep-grammars/src/semgrep-cpp/grammar.js
index 304e293..61d8eed 100644
--- a/lang/semgrep-grammars/src/semgrep-cpp/grammar.js
+++ b/lang/semgrep-grammars/src/semgrep-cpp/grammar.js
@@ -45,7 +45,7 @@ module.exports = grammar(base_grammar, {
       previous,
       seq(
       '(',
-      choice($.semgrep_typed_metavar),
+      $.semgrep_typed_metavar,
       ')',
       )
     ),