diff --git a/builder/openstack/builder.go b/builder/openstack/builder.go
index c505233bb..2938d67c0 100644
--- a/builder/openstack/builder.go
+++ b/builder/openstack/builder.go
@@ -115,9 +115,9 @@ func (b *Builder) Run(ui packer.Ui, hook packer.Hook, cache packer.Cache) (packe
 			Wait: b.config.RackconnectWait,
 		},
 		&StepAllocateIp{
-			FloatingNetwork: b.config.FloatingNetwork,
-			FloatingIP:      b.config.FloatingIP,
-			ReuseIPs:        b.config.ReuseIPs,
+			FloatingIPNetwork: b.config.FloatingIPNetwork,
+			FloatingIP:        b.config.FloatingIP,
+			ReuseIPs:          b.config.ReuseIPs,
 		},
 		&communicator.StepConnect{
 			Config: &b.config.RunConfig.Comm,
diff --git a/builder/openstack/run_config.go b/builder/openstack/run_config.go
index 1b2f209c8..ad9fa41aa 100644
--- a/builder/openstack/run_config.go
+++ b/builder/openstack/run_config.go
@@ -18,24 +18,27 @@ type RunConfig struct {
 	SSHInterface         string              `mapstructure:"ssh_interface"`
 	SSHIPVersion         string              `mapstructure:"ssh_ip_version"`
 
-	SourceImage      string            `mapstructure:"source_image"`
-	SourceImageName  string            `mapstructure:"source_image_name"`
-	Flavor           string            `mapstructure:"flavor"`
-	AvailabilityZone string            `mapstructure:"availability_zone"`
-	RackconnectWait  bool              `mapstructure:"rackconnect_wait"`
-	FloatingNetwork  string            `mapstructure:"floating_network"`
-	FloatingIP       string            `mapstructure:"floating_ip"`
-	ReuseIPs         bool              `mapstructure:"reuse_ips"`
-	SecurityGroups   []string          `mapstructure:"security_groups"`
-	Networks         []string          `mapstructure:"networks"`
-	Ports            []string          `mapstructure:"ports"`
-	UserData         string            `mapstructure:"user_data"`
-	UserDataFile     string            `mapstructure:"user_data_file"`
-	InstanceName     string            `mapstructure:"instance_name"`
-	InstanceMetadata map[string]string `mapstructure:"instance_metadata"`
+	SourceImage       string            `mapstructure:"source_image"`
+	SourceImageName   string            `mapstructure:"source_image_name"`
+	Flavor            string            `mapstructure:"flavor"`
+	AvailabilityZone  string            `mapstructure:"availability_zone"`
+	RackconnectWait   bool              `mapstructure:"rackconnect_wait"`
+	FloatingIPNetwork string            `mapstructure:"floating_ip_network"`
+	FloatingIP        string            `mapstructure:"floating_ip"`
+	ReuseIPs          bool              `mapstructure:"reuse_ips"`
+	SecurityGroups    []string          `mapstructure:"security_groups"`
+	Networks          []string          `mapstructure:"networks"`
+	Ports             []string          `mapstructure:"ports"`
+	UserData          string            `mapstructure:"user_data"`
+	UserDataFile      string            `mapstructure:"user_data_file"`
+	InstanceName      string            `mapstructure:"instance_name"`
+	InstanceMetadata  map[string]string `mapstructure:"instance_metadata"`
 
 	ConfigDrive bool `mapstructure:"config_drive"`
 
+	// Used for BC, value will be passed to the "floating_ip_network"
+	FloatingIPPool string `mapstructure:"floating_ip_pool"`
+
 	UseBlockStorageVolume  bool   `mapstructure:"use_blockstorage_volume"`
 	VolumeName             string `mapstructure:"volume_name"`
 	VolumeType             string `mapstructure:"volume_type"`
@@ -57,6 +60,10 @@ func (c *RunConfig) Prepare(ctx *interpolate.Context) []error {
 		c.TemporaryKeyPairName = fmt.Sprintf("packer_%s", uuid.TimeOrderedUUID())
 	}
 
+	if c.FloatingIPPool != "" {
+		c.FloatingIPNetwork = c.FloatingIPPool
+	}
+
 	// Validation
 	errs := c.Comm.Prepare(ctx)
 
diff --git a/builder/openstack/run_config_test.go b/builder/openstack/run_config_test.go
index b20e832d8..1f9960e27 100644
--- a/builder/openstack/run_config_test.go
+++ b/builder/openstack/run_config_test.go
@@ -101,11 +101,19 @@ func TestRunConfigPrepare_BlockStorage(t *testing.T) {
 	}
 
 	c.VolumeName = "PackerVolume"
-	if err := c.Prepare(nil); len(err) != 0 {
-		t.Fatalf("err: %s", err)
-	}
-
 	if c.VolumeName != "PackerVolume" {
 		t.Fatalf("invalid value: %s", c.VolumeName)
 	}
 }
+
+func TestRunConfigPrepare_FloatingIPPoolCompat(t *testing.T) {
+	c := testRunConfig()
+	c.FloatingIPPool = "uuid"
+	if err := c.Prepare(nil); len(err) != 0 {
+		t.Fatalf("err: %s", err)
+	}
+
+	if c.FloatingIPNetwork != "uuid" {
+		t.Fatalf("invalid value: %s", c.FloatingIPNetwork)
+	}
+}
diff --git a/builder/openstack/step_allocate_ip.go b/builder/openstack/step_allocate_ip.go
index b5a517680..7c864ca7a 100644
--- a/builder/openstack/step_allocate_ip.go
+++ b/builder/openstack/step_allocate_ip.go
@@ -11,9 +11,9 @@ import (
 )
 
 type StepAllocateIp struct {
-	FloatingNetwork string
-	FloatingIP      string
-	ReuseIPs        bool
+	FloatingIPNetwork string
+	FloatingIP        string
+	ReuseIPs          bool
 }
 
 func (s *StepAllocateIp) Run(_ context.Context, state multistep.StateBag) multistep.StepAction {
@@ -77,7 +77,7 @@ func (s *StepAllocateIp) Run(_ context.Context, state multistep.StateBag) multis
 	if instanceIP.ID == "" {
 		// Search for the external network that can be used for the floating IPs if
 		// user hasn't provided any.
-		floatingNetwork := s.FloatingNetwork
+		floatingNetwork := s.FloatingIPNetwork
 		if floatingNetwork == "" {
 			ui.Say(fmt.Sprintf("Searching for the external network..."))
 			externalNetwork, err := FindExternalNetwork(networkClient)