diff --git a/app/models/ci/pipeline.rb b/app/models/ci/pipeline.rb
index 941b01c29e0697027fbccc8e0d72eced440d5819..d1c68300067f51995ab9f47063fa3646d7a20ddb 100644
--- a/app/models/ci/pipeline.rb
+++ b/app/models/ci/pipeline.rb
@@ -120,7 +120,7 @@ module Ci
 
     # For now the only user who participates is the user who triggered
     def participants(_current_user = nil)
-      [user].compact
+      Array(user)
     end
 
     def valid_commit_sha