diff --git a/README.md b/README.md
index a59ad9a..7aeea8f 100644
--- a/README.md
+++ b/README.md
@@ -503,6 +503,7 @@ vm.option.buffer("wdm", 512)
 ```
 
 driver defined as one of ("mme", "wdm", "ks", "asio")
+
 buffer, from 128 to 2048
 
 ##### delay[i]