diff --git a/src/compiler/frontend.fut b/src/compiler/frontend.fut
index 0e94750..3174ef5 100644
--- a/src/compiler/frontend.fut
+++ b/src/compiler/frontend.fut
@@ -46,7 +46,7 @@ type token = (token.t, i32, i32)
 entry frontend_tokenize (input: []u8) (lt: lex_table []): []token =
     tokenize input lt
 
-entry frontend_num_tokens [n] (tokens: [n]token): i32 = i32.i64 n
+entry frontend_num_tokens [n] (_: [n]token): i32 = i32.i64 n
 
 entry frontend_parse (tokens: []token) (sct: stack_change_table []) (pt: parse_table []): (bool, []production.t) =
     let token_types = map (.0) tokens