--- a/taskcluster/taskgraph/transforms/partials.py
+++ b/taskcluster/taskgraph/transforms/partials.py
@@ -111,17 +111,18 @@ def make_task_description(config, jobs):
             'implementation': 'docker-worker',
             'docker-image': {'in-tree': 'funsize-update-generator'},
             'os': 'linux',
             'max-run-time': 3600,
             'chain-of-trust': True,
             'taskcluster-proxy': True,
             'env': {
                 'SHA1_SIGNING_CERT': 'nightly_sha1',
-                'SHA384_SIGNING_CERT': 'nightly_sha384'
+                'SHA384_SIGNING_CERT': 'nightly_sha384',
+                'DATADOG_API_SECRET': 'project/releng/gecko/build/level-3/datadog-api-key'
             }
         }
 
         level = config.params['level']
 
         task = {
             'label': label,
             'description': "{} Partials".format(