diff --git a/nova/virt/lxd/driver.py b/nova/virt/lxd/driver.py
index ec486ba7..246861db 100644
--- a/nova/virt/lxd/driver.py
+++ b/nova/virt/lxd/driver.py
@@ -273,8 +273,8 @@ def _sync_glance_image_to_lxd(client, context, image_ref):
                 raise
 
         try:
-            image_file = tempfile.mkstemp()[1]
-            manifest_file = tempfile.mkstemp()[1]
+            ifd, image_file = tempfile.mkstemp()
+            mfd, manifest_file = tempfile.mkstemp()
 
             image = IMAGE_API.get(context, image_ref)
             if image.get('disk_format') not in ACCEPTABLE_IMAGE_FORMATS:
@@ -371,6 +371,8 @@ def _sync_glance_image_to_lxd(client, context, image_ref):
             image.add_alias(image_ref, '')
 
         finally:
+            os.close(ifd)
+            os.close(mfd)
             os.unlink(image_file)
             os.unlink(manifest_file)