--- a/taskcluster/taskgraph/transforms/signing.py
+++ b/taskcluster/taskgraph/transforms/signing.py
@@ -54,16 +54,19 @@ signing_description_schema = Schema({
 
     # treeherder is allowed here to override any defaults we use for signing.  See
     # taskcluster/taskgraph/transforms/task.py for the schema details, and the
     # below transforms for defaults of various values.
     Optional('treeherder'): task_description_schema['treeherder'],
 
     # Routes specific to this task, if defined
     Optional('routes'): [basestring],
+
+    Optional('shipping-phase'): task_description_schema['shipping-phase'],
+    Optional('shipping-product'): task_description_schema['shipping-product'],
 })
 
 
 @transforms.add
 def validate(config, jobs):
     for job in jobs:
         label = job.get('dependent-task', object).__dict__.get('label', '?no-label?')
         yield validate_schema(