diff --git a/src/os/wait.cc b/src/os/wait.cc
index eea16326ee..ca02eee138 100644
--- a/src/os/wait.cc
+++ b/src/os/wait.cc
@@ -136,7 +136,7 @@ pid_t System::waitpid(pid_t __pid, int *__stat_loc, int __options, double timeou
     WaitTask task;
     signal_init();
     task.pid = ::waitpid(__pid, __stat_loc, __options | WNOHANG);
-    if (task.pid > 0) {
+    if (task.pid != 0) {
         return task.pid;
     }
 
diff --git a/tests/swoole_runtime/base.phpt b/tests/swoole_runtime/base.phpt
index ef2e31fef0..5d16e6af22 100644
--- a/tests/swoole_runtime/base.phpt
+++ b/tests/swoole_runtime/base.phpt
@@ -7,7 +7,7 @@ swoole_runtime: base
 require __DIR__ . '/../include/bootstrap.php';
 $server = SwooleTest\CoServer::createTcpGreeting();
 $server->run();
-Swoole\Runtime::enableCoroutine(true, SWOOLE_HOOK_ALL ^ SWOOLE_HOOK_SLEEP);
+Swoole\Runtime::enableCoroutine(SWOOLE_HOOK_ALL ^ SWOOLE_HOOK_SLEEP);
 go(function () {
     usleep(1000);
     echo '1' . PHP_EOL;