clj-loop-recur-type-error

; CompilerException java.lang.IllegalArgumentException:  recur arg for primitive local: last_byte is not
; matching primitive, had: Object, needed: byte, compiling:...

(defn test-lr []
  (loop [last-byte (byte 0)
         bytez (map byte '(1 2 3 4))
         answer '()]
    (if (empty? bytez)
      answer
      (recur (first bytez)
             (rest bytez)
             (cons (bit-or (first bytez last-byte) answer))))))