diff --git a/pkg/api/types.go b/pkg/api/types.go
index 221f73c7061..1d290b4d42c 100644
--- a/pkg/api/types.go
+++ b/pkg/api/types.go
@@ -99,8 +99,7 @@ type Port struct {
 	// Optional: If specified, this must be a DNS_LABEL.  Each named port
 	// in a pod must have a unique name.
 	Name string `yaml:"name,omitempty" json:"name,omitempty"`
-	// Optional: Defaults to ContainerPort.  If specified, this must be a
-	// valid port number, 0 < x < 65536.
+	// Optional: If specified, this must be a valid port number, 0 < x < 65536.
 	HostPort int `yaml:"hostPort,omitempty" json:"hostPort,omitempty"`
 	// Required: This must be a valid port number, 0 < x < 65536.
 	ContainerPort int `yaml:"containerPort" json:"containerPort"`
diff --git a/pkg/api/v1beta1/types.go b/pkg/api/v1beta1/types.go
index 6b2a2dc4765..ef959597477 100644
--- a/pkg/api/v1beta1/types.go
+++ b/pkg/api/v1beta1/types.go
@@ -99,8 +99,7 @@ type Port struct {
 	// Optional: If specified, this must be a DNS_LABEL.  Each named port
 	// in a pod must have a unique name.
 	Name string `yaml:"name,omitempty" json:"name,omitempty"`
-	// Optional: Defaults to ContainerPort.  If specified, this must be a
-	// valid port number, 0 < x < 65536.
+	// Optional: If specified, this must be a valid port number, 0 < x < 65536.
 	HostPort int `yaml:"hostPort,omitempty" json:"hostPort,omitempty"`
 	// Required: This must be a valid port number, 0 < x < 65536.
 	ContainerPort int `yaml:"containerPort" json:"containerPort"`
diff --git a/pkg/api/validation.go b/pkg/api/validation.go
index 4a7f08f9c94..cd54e00f7d1 100644
--- a/pkg/api/validation.go
+++ b/pkg/api/validation.go
@@ -95,9 +95,7 @@ func validatePorts(ports []Port) errs.ErrorList {
 		if !util.IsValidPortNum(port.ContainerPort) {
 			allErrs = append(allErrs, errs.NewInvalid("Port.ContainerPort", port.ContainerPort))
 		}
-		if port.HostPort == 0 {
-			port.HostPort = port.ContainerPort
-		} else if !util.IsValidPortNum(port.HostPort) {
+		if port.HostPort != 0 && !util.IsValidPortNum(port.HostPort) {
 			allErrs = append(allErrs, errs.NewInvalid("Port.HostPort", port.HostPort))
 		}
 		if len(port.Protocol) == 0 {
@@ -160,6 +158,9 @@ func AccumulateUniquePorts(containers []Container, accumulator map[int]bool, ext
 		ctr := &containers[ci]
 		for pi := range ctr.Ports {
 			port := extract(&ctr.Ports[pi])
+			if port == 0 {
+				continue
+			}
 			if accumulator[port] {
 				allErrs = append(allErrs, errs.NewDuplicate("Port", port))
 			} else {
diff --git a/pkg/api/validation_test.go b/pkg/api/validation_test.go
index 8c1a8246df8..093adc14bbd 100644
--- a/pkg/api/validation_test.go
+++ b/pkg/api/validation_test.go
@@ -73,7 +73,7 @@ func TestValidatePorts(t *testing.T) {
 	if errs := validatePorts(nonCanonicalCase); len(errs) != 0 {
 		t.Errorf("expected success: %v", errs)
 	}
-	if nonCanonicalCase[0].HostPort != 80 || nonCanonicalCase[0].Protocol != "TCP" {
+	if nonCanonicalCase[0].HostPort != 0 || nonCanonicalCase[0].Protocol != "TCP" {
 		t.Errorf("expected default values: %+v", nonCanonicalCase[0])
 	}
 
diff --git a/pkg/kubelet/kubelet.go b/pkg/kubelet/kubelet.go
index f461124df5b..7548ca02145 100644
--- a/pkg/kubelet/kubelet.go
+++ b/pkg/kubelet/kubelet.go
@@ -227,8 +227,12 @@ func makePortsAndBindings(container *api.Container) (map[docker.Port]struct{}, m
 	exposedPorts := map[docker.Port]struct{}{}
 	portBindings := map[docker.Port][]docker.PortBinding{}
 	for _, port := range container.Ports {
-		interiorPort := port.ContainerPort
 		exteriorPort := port.HostPort
+		if exteriorPort == 0 {
+			// No need to do port binding when HostPort is not specified
+			continue
+		}
+		interiorPort := port.ContainerPort
 		// Some of this port stuff is under-documented voodoo.
 		// See http://stackoverflow.com/questions/20428302/binding-a-port-to-a-host-interface-using-the-rest-api
 		var protocol string
diff --git a/pkg/scheduler/randomfit.go b/pkg/scheduler/randomfit.go
index b198f9c1c2b..ce32d741c6d 100644
--- a/pkg/scheduler/randomfit.go
+++ b/pkg/scheduler/randomfit.go
@@ -71,6 +71,9 @@ func (s *RandomFitScheduler) Schedule(pod api.Pod, minionLister MinionLister) (s
 		for _, scheduledPod := range machineToPods[machine] {
 			for _, container := range pod.DesiredState.Manifest.Containers {
 				for _, port := range container.Ports {
+					if port.HostPort == 0 {
+						continue
+					}
 					if s.containsPort(scheduledPod, port) {
 						podFits = false
 					}