diff --git a/p2p/peer.go b/p2p/peer.go
index ab668c530..45453f2b3 100644
--- a/p2p/peer.go
+++ b/p2p/peer.go
@@ -67,7 +67,7 @@ func SendEnvelopeShim(p Peer, e Envelope, lg log.Logger) bool {
 	before := time.Now()
 	defer func() {
 		if pp, ok := p.(*peer); ok {
-			pp.metrics.MessageSendTime.Observe(float64(time.Since(before)))
+			pp.metrics.MessageSendTime.Observe(time.Since(before).Seconds())
 		}
 	}()
 	/*
@@ -97,7 +97,7 @@ func TrySendEnvelopeShim(p Peer, e Envelope, lg log.Logger) bool {
 	before := time.Now()
 	defer func() {
 		if pp, ok := p.(*peer); ok {
-			pp.metrics.MessageSendTime.Observe(float64(time.Since(before)))
+			pp.metrics.MessageSendTime.Observe(time.Since(before).Seconds())
 		}
 	}()
 	/*
@@ -528,7 +528,7 @@ func createMConnection(
 	onReceive := func(chID byte, msgBytes []byte) {
 		before := time.Now()
 		defer func() {
-			p.metrics.MessageReceiveTime.Observe(float64(time.Since(before)))
+			p.metrics.MessageReceiveTime.Observe(time.Since(before).Seconds())
 		}()
 		reactor := reactorsByCh[chID]
 		if reactor == nil {