diff --git a/junctions/src/main/scala/nasti.scala b/junctions/src/main/scala/nasti.scala
index cb589785..4be7255f 100644
--- a/junctions/src/main/scala/nasti.scala
+++ b/junctions/src/main/scala/nasti.scala
@@ -342,7 +342,7 @@ class NastiErrorSlave(implicit p: Parameters) extends NastiModule {
     when (beats_left === UInt(0)) {
       responding := Bool(false)
     } .otherwise {
-      beats_left := beats_left - UInt(0)
+      beats_left := beats_left - UInt(1)
     }
   }