diff --git a/builder/hyperv/common/driver.go b/builder/hyperv/common/driver.go
index 9446c0410a9..d6cb7014198 100644
--- a/builder/hyperv/common/driver.go
+++ b/builder/hyperv/common/driver.go
@@ -52,6 +52,9 @@ type Driver interface {
 	//Set the vlan to use for machine
 	SetVirtualMachineVlanId(string, string) error
 
+	//Replace the network adapter with a (non-)legacy adapter
+	ReplaceVirtualMachineNetworkAdapter(string, bool) error
+
 	UntagVirtualMachineNetworkAdapterVlan(string, string) error
 
 	CreateExternalVirtualSwitch(string, string) error
diff --git a/builder/hyperv/common/driver_ps_4.go b/builder/hyperv/common/driver_ps_4.go
index 030ee8f5559..bb2e6a23d37 100644
--- a/builder/hyperv/common/driver_ps_4.go
+++ b/builder/hyperv/common/driver_ps_4.go
@@ -142,6 +142,11 @@ func (d *HypervPS4Driver) SetVirtualMachineVlanId(vmName string, vlanId string)
 	return hyperv.SetVirtualMachineVlanId(vmName, vlanId)
 }
 
+//Replace the network adapter with a (non-)legacy adapter
+func (d *HypervPS4Driver) ReplaceVirtualMachineNetworkAdapter(vmName string, virtual bool) error {
+	return hyperv.ReplaceVirtualMachineNetworkAdapter(vmName, virtual)
+}
+
 func (d *HypervPS4Driver) UntagVirtualMachineNetworkAdapterVlan(vmName string, switchName string) error {
 	return hyperv.UntagVirtualMachineNetworkAdapterVlan(vmName, switchName)
 }
diff --git a/builder/hyperv/common/step_create_vm.go b/builder/hyperv/common/step_create_vm.go
index 9fa65b1a86e..fe5a73cb23a 100644
--- a/builder/hyperv/common/step_create_vm.go
+++ b/builder/hyperv/common/step_create_vm.go
@@ -22,6 +22,7 @@ type StepCreateVM struct {
 	EnableDynamicMemory            bool
 	EnableSecureBoot               bool
 	EnableVirtualizationExtensions bool
+	UseLegacyNetworkAdapter        bool
 }
 
 func (s *StepCreateVM) Run(state multistep.StateBag) multistep.StepAction {
@@ -43,6 +44,16 @@ func (s *StepCreateVM) Run(state multistep.StateBag) multistep.StepAction {
 		return multistep.ActionHalt
 	}
 
+	if s.UseLegacyNetworkAdapter {
+		err := driver.ReplaceVirtualMachineNetworkAdapter(s.VMName, true)
+		if err != nil {
+			err := fmt.Errorf("Error creating legacy network adapter: %s", err)
+			state.Put("error", err)
+			ui.Error(err.Error())
+			return multistep.ActionHalt
+		}
+	}
+
 	err = driver.SetVirtualMachineCpuCount(s.VMName, s.Cpu)
 	if err != nil {
 		err := fmt.Errorf("Error creating setting virtual machine cpu: %s", err)
diff --git a/builder/hyperv/iso/builder.go b/builder/hyperv/iso/builder.go
index ede06cca00d..54383260d80 100644
--- a/builder/hyperv/iso/builder.go
+++ b/builder/hyperv/iso/builder.go
@@ -90,6 +90,7 @@ type Config struct {
 	EnableDynamicMemory            bool     `mapstructure:"enable_dynamic_memory"`
 	EnableSecureBoot               bool     `mapstructure:"enable_secure_boot"`
 	EnableVirtualizationExtensions bool     `mapstructure:"enable_virtualization_extensions"`
+	UseLegacyNetworkAdapter        bool     `mapstructure:"use_legacy_network_adapter"`
 
 	Communicator string `mapstructure:"communicator"`
 
@@ -160,6 +161,10 @@ func (b *Builder) Prepare(raws ...interface{}) ([]string, error) {
 			err = errors.New("Generation 2 vms don't support floppy drives. Use ISO image instead.")
 			errs = packer.MultiErrorAppend(errs, err)
 		}
+		if b.config.UseLegacyNetworkAdapter {
+			err = errors.New("Generation 2 vms don't support legacy network adapters.")
+			errs = packer.MultiErrorAppend(errs, err)
+		}
 	}
 
 	log.Println(fmt.Sprintf("Using switch %s", b.config.SwitchName))
@@ -339,6 +344,7 @@ func (b *Builder) Run(ui packer.Ui, hook packer.Hook, cache packer.Cache) (packe
 			EnableDynamicMemory:            b.config.EnableDynamicMemory,
 			EnableSecureBoot:               b.config.EnableSecureBoot,
 			EnableVirtualizationExtensions: b.config.EnableVirtualizationExtensions,
+			UseLegacyNetworkAdapter:        b.config.UseLegacyNetworkAdapter,
 		},
 		&hypervcommon.StepEnableIntegrationService{},
 
diff --git a/builder/hyperv/iso/builder_test.go b/builder/hyperv/iso/builder_test.go
index 3adf05aa9ad..7722f468341 100644
--- a/builder/hyperv/iso/builder_test.go
+++ b/builder/hyperv/iso/builder_test.go
@@ -248,3 +248,32 @@ func TestBuilderPrepare_ISOUrl(t *testing.T) {
 		t.Fatalf("bad: %#v", b.config.ISOUrls)
 	}
 }
+
+func TestBuilderPrepare_UseLegacyNetworkAdapter(t *testing.T) {
+	var b Builder
+	config := testConfig()
+
+	// should be allowed for default config
+	config["use_legacy_network_adapter"] = true
+
+	b = Builder{}
+	warns, err := b.Prepare(config)
+	if len(warns) > 0 {
+		t.Fatalf("bad: %#v", warns)
+	}
+	if err != nil {
+		t.Errorf("should not have error: %s", err)
+	}
+
+	// should not be allowed for gen 2
+	config["generation"] = 2
+
+	b = Builder{}
+	warns, err = b.Prepare(config)
+	if len(warns) > 0 {
+		t.Fatalf("bad: %#v", warns)
+	}
+	if err == nil {
+		t.Fatal("should have error")
+	}
+}
diff --git a/common/powershell/hyperv/hyperv.go b/common/powershell/hyperv/hyperv.go
index e57a98f0dd7..e4c9d125c0f 100644
--- a/common/powershell/hyperv/hyperv.go
+++ b/common/powershell/hyperv/hyperv.go
@@ -571,6 +571,24 @@ Set-VMNetworkAdapterVlan -VMName $vmName -Access -VlanId $vlanId
 	return err
 }
 
+func ReplaceVirtualMachineNetworkAdapter(vmName string, legacy bool) error {
+
+	var script = `
+param([string]$vmName,[string]$legacyString)
+$legacy = [System.Boolean]::Parse($legacyString)
+$switch = (Get-VMNetworkAdapter -VMName $vmName).SwitchName
+Remove-VMNetworkAdapter -VMName $vmName
+Add-VMNetworkAdapter -VMName $vmName -SwitchName $switch -Name $vmName -IsLegacy $legacy
+`
+	legacyString := "False"
+	if legacy {
+		legacyString = "True"
+	}
+	var ps powershell.PowerShellCmd
+	err := ps.Run(script, vmName, legacyString)
+	return err
+}
+
 func GetExternalOnlineVirtualSwitch() (string, error) {
 
 	var script = `
diff --git a/website/source/docs/builders/hyperv-iso.html.md b/website/source/docs/builders/hyperv-iso.html.md
index 08cb732a450..6ad6f7e64a2 100644
--- a/website/source/docs/builders/hyperv-iso.html.md
+++ b/website/source/docs/builders/hyperv-iso.html.md
@@ -195,6 +195,9 @@ can be configured for this builder.
     machine, without the file extension. By default this is "packer-BUILDNAME",
     where "BUILDNAME" is the name of the build.
 
+-   `use_legacy_network_adapter` (bool) - If true use a legacy network adapter as the NIC.
+    This defaults to false.
+
 ## Boot Command
 
 The `boot_command` configuration is very important: it specifies the keys