diff --git a/virt-xml b/virt-xml
index 750498b6c..b7d78fe2f 100755
--- a/virt-xml
+++ b/virt-xml
@@ -21,6 +21,7 @@
 import difflib
 import logging
 import os
+import re
 import sys
 
 import libvirt
@@ -81,11 +82,8 @@ def get_domain_and_guest(conn, domstr):
     except ValueError:
         isint = False
 
-    try:
-        virtinst.util.validate_uuid(domstr)
-        isuuid = True
-    except ValueError:
-        isuuid = False
+    uuidre = "[a-fA-F0-9]{8}[-]([a-fA-F0-9]{4}[-]){3}[a-fA-F0-9]{12}$"
+    isuuid = bool(re.match(uuidre, domstr))
 
     try:
         if isint:
diff --git a/virtinst/cloner.py b/virtinst/cloner.py
index 9be5485c4..c4030ddfd 100644
--- a/virtinst/cloner.py
+++ b/virtinst/cloner.py
@@ -113,14 +113,6 @@ class Cloner(object):
                           doc="Name to use for the new guest clone.")
 
     def set_clone_uuid(self, uuid):
-        try:
-            util.validate_uuid(uuid)
-        except ValueError as e:
-            raise ValueError(_("Invalid uuid for new guest: %s") % e)
-
-        if util.vm_uuid_collision(self.conn, uuid):
-            raise ValueError(_("UUID '%s' is in use by another guest.") %
-                             uuid)
         self._clone_uuid = uuid
     def get_clone_uuid(self):
         return self._clone_uuid
diff --git a/virtinst/guest.py b/virtinst/guest.py
index 44554d437..a787b499f 100644
--- a/virtinst/guest.py
+++ b/virtinst/guest.py
@@ -190,9 +190,7 @@ class Guest(XMLBuilder):
         if self._random_uuid is None:
             self._random_uuid = util.generate_uuid(self.conn)
         return self._random_uuid
-    uuid = XMLProperty("./uuid",
-                       validate_cb=lambda s, v: util.validate_uuid(v),
-                       default_cb=_get_default_uuid)
+    uuid = XMLProperty("./uuid", default_cb=_get_default_uuid)
 
 
     id = XMLProperty("./@id", is_int=True)
diff --git a/virtinst/network.py b/virtinst/network.py
index 1cc71118c..271762b54 100644
--- a/virtinst/network.py
+++ b/virtinst/network.py
@@ -240,9 +240,7 @@ class Network(XMLBuilder):
 
     ipv6 = XMLProperty("./@ipv6", is_yesno=True)
     name = XMLProperty("./name", validate_cb=_validate_name)
-    uuid = XMLProperty("./uuid",
-                       validate_cb=lambda s, v: util.validate_uuid(v),
-                       default_cb=_get_default_uuid)
+    uuid = XMLProperty("./uuid", default_cb=_get_default_uuid)
 
     virtualport_type = XMLProperty("./virtualport/@type")
 
diff --git a/virtinst/storage.py b/virtinst/storage.py
index 254e7ff60..1b3d2de6a 100644
--- a/virtinst/storage.py
+++ b/virtinst/storage.py
@@ -409,9 +409,7 @@ class StoragePool(_StorageObject):
 
     type = XMLProperty("./@type",
         doc=_("Storage device type the pool will represent."))
-    uuid = XMLProperty("./uuid",
-                       validate_cb=lambda s, v: util.validate_uuid(v),
-                       default_cb=_get_default_uuid)
+    uuid = XMLProperty("./uuid", default_cb=_get_default_uuid)
 
     capacity = XMLProperty("./capacity", is_int=True)
     allocation = XMLProperty("./allocation", is_int=True)
diff --git a/virtinst/sysinfo.py b/virtinst/sysinfo.py
index c42aa4edd..de4ddfaa9 100644
--- a/virtinst/sysinfo.py
+++ b/virtinst/sysinfo.py
@@ -23,7 +23,6 @@ Classes for building and installing with libvirt <sysinfo> XML
 import datetime
 
 from .xmlbuilder import XMLBuilder, XMLProperty
-from . import util
 
 
 class SYSInfo(XMLBuilder):
@@ -59,20 +58,7 @@ class SYSInfo(XMLBuilder):
     bios_version = XMLProperty("./bios/entry[@name='version']")
     bios_release = XMLProperty("./bios/entry[@name='release']")
 
-
-    def _validate_uuid(self, val):
-        try:
-            util.validate_uuid(val)
-        except ValueError:
-            raise ValueError(_("Invalid uuid for SMBios: %s") % val)
-
-        if util.vm_uuid_collision(self.conn, val):
-            raise ValueError(_("UUID '%s' is in use by another guest.") %
-                        val)
-        return val
-    system_uuid = XMLProperty("./system/entry[@name='uuid']",
-                              validate_cb=_validate_uuid)
-
+    system_uuid = XMLProperty("./system/entry[@name='uuid']")
     system_manufacturer = XMLProperty("./system/entry[@name='manufacturer']")
     system_product = XMLProperty("./system/entry[@name='product']")
     system_version = XMLProperty("./system/entry[@name='version']")