diff --git a/cmd/swarm/swarm-smoke-pss/main.go b/cmd/swarm/swarm-smoke-pss/main.go
index 82d84dd3e3..53c069508e 100644
--- a/cmd/swarm/swarm-smoke-pss/main.go
+++ b/cmd/swarm/swarm-smoke-pss/main.go
@@ -39,7 +39,6 @@ var (
 var (
 	allhosts        string
 	hosts           []string
-	filesize        int
 	inputSeed       int
 	wsPort          int
 	verbosity       int
diff --git a/cmd/swarm/swarm-smoke-pss/pss.go b/cmd/swarm/swarm-smoke-pss/pss.go
index 59fc54ac5e..9e98f2bed0 100644
--- a/cmd/swarm/swarm-smoke-pss/pss.go
+++ b/cmd/swarm/swarm-smoke-pss/pss.go
@@ -336,7 +336,5 @@ func (s *pssSession) sendSymMessage(sender *pssNode, receiver *pssNode, msg []by
 }
 
 func toMsgIdx(msg []byte) string {
-	h := sha1.New()
-	h.Write(msg)
-	return string(h.Sum(nil))
+	return fmt.Sprintf("%x", sha1.Sum(msg))
 }