diff --git a/rocket/src/main/scala/util.scala b/rocket/src/main/scala/util.scala
index e912bb1b..7595ce8b 100644
--- a/rocket/src/main/scala/util.scala
+++ b/rocket/src/main/scala/util.scala
@@ -201,6 +201,7 @@ class FlowThroughSerializer[T <: HasTileLinkData](gen: LogicalNetworkIO[T], n: I
     when(io.out.ready) { 
       cnt := cnt + UInt(1)
       when(wrap) {
+        cnt := UInt(0)
         io.done := Bool(true)
         active := Bool(false)
       }