diff --git a/backend.py b/backend.py
index e1733465..3def777f 100644
--- a/backend.py
+++ b/backend.py
@@ -106,6 +106,7 @@ def getPrepSequence(ans, interactive):
     seq = [
         Task(util.getUUID, As(ans), ['installation-uuid']),
         Task(util.getUUID, As(ans), ['control-domain-uuid']),
+        Task(util.mgmtAddrType, As(ans), ['management-address-type']),
         Task(util.randomLabelStr, As(ans), ['disk-label-suffix']),
         Task(diskutil.create_raid, A(ans, 'raid'), []),
         Task(partitionTargetDisk, A(ans, 'primary-disk', 'installation-to-overwrite', 'preserve-first-partition','sr-on-primary'), ['target-boot-mode', 'boot-partnum', 'primary-partnum', 'backup-partnum', 'logs-partnum', 'swap-partnum', 'storage-partnum']),
@@ -190,7 +191,7 @@ def getFinalisationSequence(ans):
         Task(writeFstab, A(ans, 'mounts', 'target-boot-mode', 'primary-disk', 'logs-partnum', 'swap-partnum', 'disk-label-suffix'), []),
         Task(enableAgent, A(ans, 'mounts', 'network-backend', 'services'), []),
         Task(configureCC, A(ans, 'mounts'), []),
-        Task(writeInventory, A(ans, 'installation-uuid', 'control-domain-uuid', 'mounts', 'primary-disk',
+        Task(writeInventory, A(ans, 'installation-uuid', 'control-domain-uuid', 'management-address-type', 'mounts', 'primary-disk',
                                'backup-partnum', 'storage-partnum', 'guest-disks', 'net-admin-bridge',
                                'branding', 'net-admin-configuration', 'host-config', 'install-type'), []),
         Task(writeXencommons, A(ans, 'control-domain-uuid', 'mounts'), []),
@@ -1595,7 +1596,7 @@ def writeXencommons(controlID, mounts):
     with open(os.path.join(mounts['root'], constants.XENCOMMONS_FILE), "w") as f:
         f.write(contents)
 
-def writeInventory(installID, controlID, mounts, primary_disk, backup_partnum, storage_partnum, guest_disks, admin_bridge, branding, admin_config, host_config, install_type):
+def writeInventory(installID, controlID, mgmtAddrType, mounts, primary_disk, backup_partnum, storage_partnum, guest_disks, admin_bridge, branding, admin_config, host_config, install_type):
     inv = open(os.path.join(mounts['root'], constants.INVENTORY_FILE), "w")
     if 'product-brand' in branding:
        inv.write("PRODUCT_BRAND='%s'\n" % branding['product-brand'])
@@ -1636,11 +1637,15 @@ def writeInventory(installID, controlID, mounts, primary_disk, backup_partnum, s
     inv.write("DOM0_MEM='%d'\n" % host_config['dom0-mem'])
     inv.write("DOM0_VCPUS='%d'\n" % host_config['dom0-vcpus'])
     inv.write("MANAGEMENT_INTERFACE='%s'\n" % admin_bridge)
-    # Default to IPv4 unless we have only got an IPv6 admin interface
-    if ((not admin_config.mode) and admin_config.modev6):
-        inv.write("MANAGEMENT_ADDRESS_TYPE='IPv6'\n")
+    # If we read MANAGEMENT_ADDRESS_TYPE from xensource-inventory use it
+    if mgmtAddrType:
+        inv.write("MANAGEMENT_ADDRESS_TYPE='%s'\n" % mgmtAddrType)
     else:
-        inv.write("MANAGEMENT_ADDRESS_TYPE='IPv4'\n")
+        # Default to IPv4 unless we have only got an IPv6 admin interface
+        if ((not admin_config.mode) and admin_config.modev6):
+            inv.write("MANAGEMENT_ADDRESS_TYPE='IPv6'\n")
+        else:
+            inv.write("MANAGEMENT_ADDRESS_TYPE='IPv4'\n")
     if constants.CC_PREPARATIONS and install_type == constants.INSTALL_TYPE_FRESH:
         inv.write("CC_PREPARATIONS='true'\n")
     inv.close()
diff --git a/upgrade.py b/upgrade.py
index 99a9cf2c..d1604462 100644
--- a/upgrade.py
+++ b/upgrade.py
@@ -524,17 +524,18 @@ def replace_config(config_file, destination):
             primary_fs.unmount()
 
     prepUpgradeArgs = []
-    prepStateChanges = ['installation-uuid', 'control-domain-uuid']
-    def prepareUpgrade(self, progress_callback):
+    prepStateChanges = ['installation-uuid', 'control-domain-uuid', 'management-address-type']
+    def prepareUpgrade(self, progress_callback, installID, controlID, mgmtAddrType):
         """ Try to preserve the installation and control-domain UUIDs from
         xensource-inventory."""
         try:
             installID = self.source.getInventoryValue("INSTALLATION_UUID")
             controlID = self.source.getInventoryValue("CONTROL_DOMAIN_UUID")
+            mgmtAddrType = self.source.getInventoryValue("MANAGEMENT_ADDRESS_TYPE")
         except KeyError:
-            raise RuntimeError("Required information (INSTALLATION_UUID, CONTROL_DOMAIN_UUID) was missing from your xensource-inventory file.  Aborting installation; please replace these keys and try again.")
+            raise RuntimeError("Required information (INSTALLATION_UUID, CONTROL_DOMAIN_UUID, MANAGEMENT_ADDRESS_TYPE) was missing from your xensource-inventory file.  Aborting installation; please replace these keys and try again.")
 
-        return installID, controlID
+        return installID, controlID, mgmtAddrType
 
     def buildRestoreList(self, src_base):
         self.restore_list += ['etc/xensource/ptoken', 'etc/xensource/pool.conf',
diff --git a/util.py b/util.py
index 569babfa..8656f039 100644
--- a/util.py
+++ b/util.py
@@ -359,6 +359,9 @@ def udevinfoCmd():
 def randomLabelStr():
     return "".join([random.choice(string.ascii_lowercase) for x in range(6)])
 
+def mgmtAddrType():
+    return None
+
 def getLocalTime(timezone=None):
     if timezone:
         os.environ['TZ'] = timezone