diff --git a/src/parser/tokenizer.ts b/src/parser/tokenizer.ts
index 7117f73579..511d7af62a 100644
--- a/src/parser/tokenizer.ts
+++ b/src/parser/tokenizer.ts
@@ -62,7 +62,7 @@ export class Tokenizer {
   }
   readOperator (): OperatorToken | undefined {
     this.skipBlank()
-    const end = matchOperator(this.input, this.p, this.trie, this.p + 8)
+    const end = matchOperator(this.input, this.p, this.trie)
     if (end === -1) return
     return new OperatorToken(this.input, this.p, (this.p = end), this.file)
   }