diff --git a/docs/docsite/rst/guide_gce.rst b/docs/docsite/rst/guide_gce.rst
index 1b24d0bddd..4c891645c5 100644
--- a/docs/docsite/rst/guide_gce.rst
+++ b/docs/docsite/rst/guide_gce.rst
@@ -95,7 +95,7 @@ credentials path as follows so that get automatically picked up:
 .. code-block:: python
 
     GCE_PARAMS = ('', '')
-    GCE_KEYWORD_PARAMS = {'project': 'project_id'}
+    GCE_KEYWORD_PARAMS = {'project': 'project_id', 'datacenter': ''}
 
 Configuring Modules with Environment Variables
 ``````````````````````````````````````````````