diff --git a/app/models/ci/pipeline.rb b/app/models/ci/pipeline.rb
index d534fdc05607a0b003c3073921cfd647f685cebf..0ed1c496022135f6635e4dd81902396c474f5f4f 100644
--- a/app/models/ci/pipeline.rb
+++ b/app/models/ci/pipeline.rb
@@ -116,7 +116,7 @@ module Ci
 
     # For now the only user who participates is the user who triggered
     def participants(_current_user = nil)
-      [user]
+      [user].compact
     end
 
     def valid_commit_sha