diff --git a/core/src/main/scala/kafka/producer/async/AsyncProducerConfig.scala b/core/src/main/scala/kafka/producer/async/AsyncProducerConfig.scala
index 973fa08..dd39de5 100644
--- a/core/src/main/scala/kafka/producer/async/AsyncProducerConfig.scala
+++ b/core/src/main/scala/kafka/producer/async/AsyncProducerConfig.scala
@@ -33,7 +33,7 @@ trait AsyncProducerConfig {
    * -ve: enqueue will block indefinitely if the queue is full
    * +ve: enqueue will block up to this many milliseconds if the queue is full
    */
-  val queueEnqueueTimeoutMs = props.getInt("queue.enqueue.timeout.ms", 0)
+  val queueEnqueueTimeoutMs = props.getInt("queue.enqueue.timeout.ms", -1)
 
   /** the number of messages batched at the producer */
   val batchNumMessages = props.getInt("batch.num.messages", 200)