diff --git a/lib/childprocess/process_spawn_process.rb b/lib/childprocess/process_spawn_process.rb
index 11bd3a6..73041ef 100644
--- a/lib/childprocess/process_spawn_process.rb
+++ b/lib/childprocess/process_spawn_process.rb
@@ -8,7 +8,7 @@ def exited?
       return true if @exit_code
 
       assert_started
-      pid, status = ::Process.waitpid2(@pid, ::Process::WNOHANG | ::Process::WUNTRACED)
+      pid, status = ::Process.waitpid2(@pid, ::Process::WNOHANG)
       pid = nil if pid == 0 # may happen on jruby
 
       log(:pid => pid, :status => status)
diff --git a/spec/unix_spec.rb b/spec/unix_spec.rb
index fe5b61b..b6cd7e8 100644
--- a/spec/unix_spec.rb
+++ b/spec/unix_spec.rb
@@ -6,6 +6,21 @@
   describe ChildProcess::Unix::Process do
     it_behaves_like "a platform that provides the child's pid"
 
+    it "does not treat a stopped child as exited" do
+      process = sleeping_ruby.start
+      Process.kill("STOP", process.pid)
+
+      wait_until do
+        IO.popen(["ps", "-o", "state=", "-p", process.pid.to_s], &:read).strip.start_with?("T")
+      end
+      expect(process).not_to be_exited
+
+      Process.kill("CONT", process.pid)
+      process.stop
+    ensure
+      Process.kill("CONT", process.pid) if process&.alive?
+    end
+
     it "handles ECHILD race condition where process dies between timeout and KILL" do
       process = sleeping_ruby