diff --git a/client/driver/docker.go b/client/driver/docker.go
index a59ec1d30..73fd1e688 100644
--- a/client/driver/docker.go
+++ b/client/driver/docker.go
@@ -6,6 +6,7 @@ import (
 	"log"
 	"os/exec"
 	"regexp"
+	"strconv"
 	"strings"
 
 	docker "github.com/fsouza/go-dockerclient"
@@ -117,13 +118,13 @@ func containerOptionsForTask(ctx *ExecContext, task *structs.Task, logger *log.L
 			// the container, and assume that the process inside will read the
 			// environment variable and bind to the correct port.
 			if reNumeric.MatchString(label) {
-				dockerPorts[docker.Port(label+"/tcp")] = []docker.PortBinding{docker.PortBinding{HostIP: network.IP, HostPort: string(port)}}
-				dockerPorts[docker.Port(label+"/udp")] = []docker.PortBinding{docker.PortBinding{HostIP: network.IP, HostPort: string(port)}}
+				dockerPorts[docker.Port(label+"/tcp")] = []docker.PortBinding{docker.PortBinding{HostIP: network.IP, HostPort: strconv.Itoa(port)}}
+				dockerPorts[docker.Port(label+"/udp")] = []docker.PortBinding{docker.PortBinding{HostIP: network.IP, HostPort: strconv.Itoa(port)}}
 				logger.Printf("[DEBUG] driver.docker: allocated port %s:%d -> %s (mapped)", network.IP, port, label)
 			} else {
-				dockerPorts[docker.Port(string(port)+"/tcp")] = []docker.PortBinding{docker.PortBinding{HostIP: network.IP, HostPort: string(port)}}
-				dockerPorts[docker.Port(string(port)+"/udp")] = []docker.PortBinding{docker.PortBinding{HostIP: network.IP, HostPort: string(port)}}
-				logger.Printf("[DEBUG] driver.docker: allocated port %s:%d -> %d for label %s", network.IP, port, port, label)
+				dockerPorts[docker.Port(strconv.Itoa(port)+"/tcp")] = []docker.PortBinding{docker.PortBinding{HostIP: network.IP, HostPort: strconv.Itoa(port)}}
+				dockerPorts[docker.Port(strconv.Itoa(port)+"/udp")] = []docker.PortBinding{docker.PortBinding{HostIP: network.IP, HostPort: strconv.Itoa(port)}}
+				logger.Printf("[DEBUG] driver.docker: allocated port %s:%d -> %d for label %s\n", network.IP, port, port, label)
 			}
 		}
 		containerConfig.PortBindings = dockerPorts