diff --git a/core/src/main/scala/scalikejdbc/async/internal/AsyncResultSetImpl.scala b/core/src/main/scala/scalikejdbc/async/internal/AsyncResultSetImpl.scala
index fa03d83..882e8e3 100644
--- a/core/src/main/scala/scalikejdbc/async/internal/AsyncResultSetImpl.scala
+++ b/core/src/main/scala/scalikejdbc/async/internal/AsyncResultSetImpl.scala
@@ -29,7 +29,7 @@ private[scalikejdbc] class AsyncResultSetImpl(rows: IndexedSeq[RowData])
     with AsyncResultSet {
 
   // AsyncResultSet API
-  override def next(): Boolean = rows.headOption.isDefined
+  override def next(): Boolean = rows.nonEmpty
   override def tail(): AsyncResultSet = new AsyncResultSetImpl(rows.tail)
 
 }