diff --git a/taskcluster/taskgraph/actions/registry.py b/taskcluster/taskgraph/actions/registry.py
index 060c4551965c1..7e376caf3c101 100644
--- a/taskcluster/taskgraph/actions/registry.py
+++ b/taskcluster/taskgraph/actions/registry.py
@@ -166,7 +166,9 @@ def register_callback_action(name, title, symbol, description, order=10000,
     def register_callback(cb):
         assert isinstance(cb, FunctionType), 'callback must be a function'
         assert isinstance(symbol, basestring), 'symbol must be a string'
-        assert 1 <= len(symbol) <= 25, 'symbol must be between 1 and 25 characters'
+        # Allow for json-e > 25 chars in the symbol.
+        if '$' not in symbol:
+            assert 1 <= len(symbol) <= 25, 'symbol must be between 1 and 25 characters'
         assert not mem['registered'], 'register_callback_action must be used as decorator'
         assert cb.__name__ not in callbacks, 'callback name {} is not unique'.format(cb.__name__)
 
diff --git a/taskcluster/taskgraph/actions/release_promotion.py b/taskcluster/taskgraph/actions/release_promotion.py
index f0ab6ef84b688..ace3f24d37776 100644
--- a/taskcluster/taskgraph/actions/release_promotion.py
+++ b/taskcluster/taskgraph/actions/release_promotion.py
@@ -89,7 +89,7 @@ def is_release_promotion_available(parameters):
 @register_callback_action(
     name='release-promotion',
     title='Release Promotion',
-    symbol='Relpro',
+    symbol='${input.release_promotion_flavor}',
     description="Promote a release.",
     order=10000,
     context=[],