diff --git a/ruby/lib/ci/queue/redis/base.rb b/ruby/lib/ci/queue/redis/base.rb
index 5a638e9..9ebdd58 100644
--- a/ruby/lib/ci/queue/redis/base.rb
+++ b/ruby/lib/ci/queue/redis/base.rb
@@ -61,7 +61,7 @@ def wait_for_master(timeout: 120)
 
             sleep 0.1
           end
-          raise LostMaster, "The master worker is still `#{master_status}` after #{timeout} seconds waiting."
+          raise LostMaster, "The master worker (worker #{master_worker_id}) is still `#{master_status}` after #{timeout} seconds waiting."
         end
 
         def workers_count