@@ -17,7 +17,6 @@ import (

 	"github.com/docker/docker/layer"

 	"github.com/docker/docker/pkg/ioutils"

 	"github.com/docker/docker/reference"

-	"github.com/docker/go-connections/nat"

 )

 // merge merges two Config, the image container configuration (defaults values),

@@ -32,9 +31,6 @@ func merge(userConf, imageConf *containertypes.Config) error {

 	if len(userConf.ExposedPorts) == 0 {

 		userConf.ExposedPorts = imageConf.ExposedPorts

 	} else if imageConf.ExposedPorts != nil {

-		if userConf.ExposedPorts == nil {

-			userConf.ExposedPorts = make(nat.PortSet)

-		}

 		for port := range imageConf.ExposedPorts {

 			if _, exists := userConf.ExposedPorts[port]; !exists {

 				userConf.ExposedPorts[port] = struct{}{}