diff --git a/libnetwork/cmd/dnet/cmd.go b/libnetwork/cmd/dnet/cmd.go
index c9ec2d2b1d..428b433bab 100644
--- a/libnetwork/cmd/dnet/cmd.go
+++ b/libnetwork/cmd/dnet/cmd.go
@@ -44,7 +44,7 @@ var (
 
 func runContainerCreate(c *cli.Context) {
 	if len(c.Args()) == 0 {
-		fmt.Print("Please provide container id argument\n")
+		fmt.Println("Please provide container id argument")
 		os.Exit(1)
 	}
 
@@ -70,7 +70,7 @@ func runContainerRm(c *cli.Context) {
 	var sbList []*client.SandboxResource
 
 	if len(c.Args()) == 0 {
-		fmt.Print("Please provide container id argument\n")
+		fmt.Println("Please provide container id argument")
 		os.Exit(1)
 	}
 
diff --git a/libnetwork/cmd/proxy/proxy.go b/libnetwork/cmd/proxy/proxy.go
index b846905316..67574afa5e 100644
--- a/libnetwork/cmd/proxy/proxy.go
+++ b/libnetwork/cmd/proxy/proxy.go
@@ -3,7 +3,6 @@
 package main
 
 import (
-	"errors"
 	"net"
 )
 
@@ -32,6 +31,6 @@ func NewProxy(frontendAddr, backendAddr net.Addr) (Proxy, error) {
 	case *net.TCPAddr:
 		return NewTCPProxy(frontendAddr.(*net.TCPAddr), backendAddr.(*net.TCPAddr))
 	default:
-		panic(errors.New("Unsupported protocol"))
+		panic("Unsupported protocol")
 	}
 }