diff --git a/models/examples/gfdl_cm3/schemas/output/gfdl_cm3.json b/models/examples/gfdl_cm3/schemas/output/gfdl_cm3.json
index b46bde4..f9ac2b4 100644
--- a/models/examples/gfdl_cm3/schemas/output/gfdl_cm3.json
+++ b/models/examples/gfdl_cm3/schemas/output/gfdl_cm3.json
@@ -19,7 +19,7 @@
       "type": "object",
       "properties":{
               "data": {"type": "object"},
-              "granularity": {"type": "string", "value": "global"}
+              "granularity": {"type": "null"}
       }
     }
   },
diff --git a/models/examples/gfdl_cm3/src/inner_wrapper.py b/models/examples/gfdl_cm3/src/inner_wrapper.py
index 07e85df..0dcb829 100644
--- a/models/examples/gfdl_cm3/src/inner_wrapper.py
+++ b/models/examples/gfdl_cm3/src/inner_wrapper.py
@@ -36,8 +36,8 @@ class InnerWrapper(OuterWrapper):
         results = {
             'gfdl_cm3': {
                 'global_temp': {
-                    'data': {'temp': self.global_temp},
-                    'granularity': 'global',
+                    'data': {'global_temp': self.global_temp},
+                    'granularity': None,
                 },
                 'precipitation': {
                     'data': self.precipitation,
diff --git a/outer_wrapper.py b/outer_wrapper.py
index 4bb397f..acc3420 100755
--- a/outer_wrapper.py
+++ b/outer_wrapper.py
@@ -188,7 +188,7 @@ class OuterWrapper(ABC):
             '    ".*": {'
             '      "type": "object", '
             '      "properties": {'
-            '         "data": {"type": "object"}, "granularity": {"type": "string"}'
+            '         "data": {"type": "object"}, "granularity": {"type": ["string", "null"]}'
             '      },'
             '      "required": ["data", "granularity"]'
             '    }'