diff --git a/autogenerate_config_docs/hooks.py b/autogenerate_config_docs/hooks.py
index a51cde59..e9d62bb0 100644
--- a/autogenerate_config_docs/hooks.py
+++ b/autogenerate_config_docs/hooks.py
@@ -36,6 +36,11 @@ def glance_store_config():
 
 
 def nova_spice():
+    import os
+    # nova.cmd.__init__ before kilo requires to be imported before eventlet is.
+    # Since we can't make sure of that, we define this envvar to let nova know
+    # that the import is OK (see nova/cmd/__init__.py)
+    os.environ['EVENTLET_NO_GREENDNS'] = 'yes'
     import nova.cmd.spicehtml5proxy  # noqa