diff --git a/examples/multipro/echo.go b/examples/multipro/echo.go
index eda408831f..e9b58bcffe 100644
--- a/examples/multipro/echo.go
+++ b/examples/multipro/echo.go
@@ -48,7 +48,7 @@ func (e *EchoProtocol) onEchoRequest(s network.Stream) {
 	s.Close()
 
 	// unmarshal it
-	proto.Unmarshal(buf, data)
+	err = proto.Unmarshal(buf, data)
 	if err != nil {
 		log.Println(err)
 		return
@@ -101,7 +101,7 @@ func (e *EchoProtocol) onEchoResponse(s network.Stream) {
 	s.Close()
 
 	// unmarshal it
-	proto.Unmarshal(buf, data)
+	err = proto.Unmarshal(buf, data)
 	if err != nil {
 		log.Println(err)
 		return
diff --git a/examples/multipro/ping.go b/examples/multipro/ping.go
index bb982c1e59..43666bc947 100644
--- a/examples/multipro/ping.go
+++ b/examples/multipro/ping.go
@@ -45,7 +45,7 @@ func (p *PingProtocol) onPingRequest(s network.Stream) {
 	s.Close()
 
 	// unmarshal it
-	proto.Unmarshal(buf, data)
+	err = proto.Unmarshal(buf, data)
 	if err != nil {
 		log.Println(err)
 		return
@@ -96,7 +96,7 @@ func (p *PingProtocol) onPingResponse(s network.Stream) {
 	s.Close()
 
 	// unmarshal it
-	proto.Unmarshal(buf, data)
+	err = proto.Unmarshal(buf, data)
 	if err != nil {
 		log.Println(err)
 		return