--- a/taskcluster/taskgraph/actions/release_promotion.py
+++ b/taskcluster/taskgraph/actions/release_promotion.py
@@ -361,16 +361,19 @@ def release_promotion_action(parameters,
     if not partner_config and (release_enable_emefree or release_enable_partners):
         partner_url_config = get_partner_url_config(
             parameters, graph_config, enable_emefree=release_enable_emefree,
             enable_partners=release_enable_partners
         )
         github_token = get_token(parameters)
         partner_config = get_partner_config(partner_url_config, github_token)
 
+    if input.get('release_partner_build_number'):
+        parameters['release_partner_build_number'] = input['release_partner_build_number']
+
     if partner_config:
         parameters['release_partner_config'] = fix_partner_config(partner_config)
 
     if input['version']:
         parameters['version'] = input['version']
 
     # make parameters read-only
     parameters = Parameters(**parameters)