diff --git a/sys/sys/aio.h b/sys/sys/aio.h
index a85958e03db..6ab8bdb7f29 100644
--- a/sys/sys/aio.h
+++ b/sys/sys/aio.h
@@ -54,7 +54,7 @@
 #define	LIO_WAIT		0x1
 
 /*
- * Maximum number of allowed LIO operations
+ * Maximum number of operations in a single lio_listio call
  */
 #define	AIO_LISTIO_MAX		16