diff --git a/lib/puma/cluster.rb b/lib/puma/cluster.rb
index 0d7c12bd69..dc832850cc 100644
--- a/lib/puma/cluster.rb
+++ b/lib/puma/cluster.rb
@@ -560,9 +560,11 @@ def wait_workers
       @workers.reject! do |w|
         next false if w.pid.nil?
         begin
-          # When `fork_worker` is enabled, some worker may not be direct children, but grand children.
-          # Because of this they won't be reaped by `Process.wait2(-1)`, so we need to check them individually)
-          if reaped_children.delete(w.pid) || (@options[:fork_worker] && Process.wait(w.pid, Process::WNOHANG))
+          # We may need to check the PID individually because:
+          # 1. On some environments running as PID 1, `Process.wait2(-1)` might not return anything.
+          # 2. When `fork_worker` is enabled, some worker may not be direct children, but grand children.
+          # Because of this they won't be reaped by `Process.wait2(-1)`.
+          if reaped_children.delete(w.pid) || Process.wait(w.pid, Process::WNOHANG)
             true
           else
             w.term if w.term?