diff --git a/api_params.go b/api_params.go
index df879f63ee..43a536d601 100644
--- a/api_params.go
+++ b/api_params.go
@@ -1,5 +1,7 @@
 package docker
 
+import "encoding/json"
+
 type APIHistory struct {
 	ID        string   `json:"Id"`
 	Tags      []string `json:",omitempty"`
@@ -47,7 +49,7 @@ type APIContainers struct {
 	Command    string
 	Created    int64
 	Status     string
-	Ports      string
+	Ports      []APIPort
 	SizeRw     int64
 	SizeRootFs int64
 }
@@ -67,7 +69,17 @@ type APIRun struct {
 }
 
 type APIPort struct {
-	Port string
+	PrivatePort int64
+	PublicPort  int64
+	Type        string
+}
+
+func (port *APIPort) MarshalJSON() ([]byte, error) {
+	return json.Marshal(map[string]interface{}{
+		"PrivatePort": port.PrivatePort,
+		"PublicPort":  port.PublicPort,
+		"Type":        port.Type,
+	})
 }
 
 type APIVersion struct {
diff --git a/commands.go b/commands.go
index b2a4d3db13..5ca8309f4f 100644
--- a/commands.go
+++ b/commands.go
@@ -21,6 +21,7 @@ import (
 	"path/filepath"
 	"reflect"
 	"runtime"
+	"sort"
 	"strconv"
 	"strings"
 	"syscall"
@@ -958,6 +959,19 @@ func (cli *DockerCli) CmdImages(args ...string) error {
 	return nil
 }
 
+func displayablePorts(ports []APIPort) string {
+	result := []string{}
+	for _, port := range ports {
+		if port.Type == "tcp" {
+			result = append(result, fmt.Sprintf("%d->%d", port.PublicPort, port.PrivatePort))
+		} else {
+			result = append(result, fmt.Sprintf("%d->%d/%s", port.PublicPort, port.PrivatePort, port.Type))
+		}
+	}
+	sort.Strings(result)
+	return strings.Join(result, ", ")
+}
+
 func (cli *DockerCli) CmdPs(args ...string) error {
 	cmd := Subcmd("ps", "[OPTIONS]", "List containers")
 	quiet := cmd.Bool("q", false, "Only display numeric IDs")
@@ -1015,9 +1029,9 @@ func (cli *DockerCli) CmdPs(args ...string) error {
 	for _, out := range outs {
 		if !*quiet {
 			if *noTrunc {
-				fmt.Fprintf(w, "%s\t%s\t%s\t%s ago\t%s\t%s\t", out.ID, out.Image, out.Command, utils.HumanDuration(time.Now().Sub(time.Unix(out.Created, 0))), out.Status, out.Ports)
+				fmt.Fprintf(w, "%s\t%s\t%s\t%s ago\t%s\t%s\t", out.ID, out.Image, out.Command, utils.HumanDuration(time.Now().Sub(time.Unix(out.Created, 0))), out.Status, displayablePorts(out.Ports))
 			} else {
-				fmt.Fprintf(w, "%s\t%s\t%s\t%s ago\t%s\t%s\t", utils.TruncateID(out.ID), out.Image, utils.Trunc(out.Command, 20), utils.HumanDuration(time.Now().Sub(time.Unix(out.Created, 0))), out.Status, out.Ports)
+				fmt.Fprintf(w, "%s\t%s\t%s\t%s ago\t%s\t%s\t", utils.TruncateID(out.ID), out.Image, utils.Trunc(out.Command, 20), utils.HumanDuration(time.Now().Sub(time.Unix(out.Created, 0))), out.Status, displayablePorts(out.Ports))
 			}
 			if *size {
 				if out.SizeRootFs > 0 {
diff --git a/container.go b/container.go
index 39c19c53d4..5122fd7fcf 100644
--- a/container.go
+++ b/container.go
@@ -15,7 +15,6 @@ import (
 	"os/exec"
 	"path"
 	"path/filepath"
-	"sort"
 	"strconv"
 	"strings"
 	"syscall"
@@ -253,17 +252,28 @@ type NetworkSettings struct {
 	PortMapping map[string]PortMapping
 }
 
-// String returns a human-readable description of the port mapping defined in the settings
-func (settings *NetworkSettings) PortMappingHuman() string {
-	var mapping []string
+// returns a more easy to process description of the port mapping defined in the settings
+func (settings *NetworkSettings) PortMappingAPI() []APIPort {
+	var mapping []APIPort
 	for private, public := range settings.PortMapping["Tcp"] {
-		mapping = append(mapping, fmt.Sprintf("%s->%s", public, private))
+		pubint, _ := strconv.ParseInt(public, 0, 0)
+		privint, _ := strconv.ParseInt(private, 0, 0)
+		mapping = append(mapping, APIPort{
+			PrivatePort: privint,
+			PublicPort:  pubint,
+			Type:        "tcp",
+		})
 	}
 	for private, public := range settings.PortMapping["Udp"] {
-		mapping = append(mapping, fmt.Sprintf("%s->%s/udp", public, private))
+		pubint, _ := strconv.ParseInt(public, 0, 0)
+		privint, _ := strconv.ParseInt(private, 0, 0)
+		mapping = append(mapping, APIPort{
+			PrivatePort: privint,
+			PublicPort:  pubint,
+			Type:        "udp",
+		})
 	}
-	sort.Strings(mapping)
-	return strings.Join(mapping, ", ")
+	return mapping
 }
 
 // Inject the io.Reader at the given path. Note: do not close the reader
diff --git a/server.go b/server.go
index 646cb44877..386f0e27b4 100644
--- a/server.go
+++ b/server.go
@@ -386,7 +386,7 @@ func (srv *Server) Containers(all, size bool, n int, since, before string) []API
 		c.Command = fmt.Sprintf("%s %s", container.Path, strings.Join(container.Args, " "))
 		c.Created = container.Created.Unix()
 		c.Status = container.State.String()
-		c.Ports = container.NetworkSettings.PortMappingHuman()
+		c.Ports = container.NetworkSettings.PortMappingAPI()
 		if size {
 			c.SizeRw, c.SizeRootFs = container.GetSize()
 		}