diff --git a/swoole_coroutine.cc b/swoole_coroutine.cc
index 422426a96dd..7bf43772ac5 100644
--- a/swoole_coroutine.cc
+++ b/swoole_coroutine.cc
@@ -525,11 +525,15 @@ void PHPCoroutine::on_close(void *arg) {
     }
 
     if (OG(handlers).elements) {
+        zend_bool no_headers = SG(request_info).no_headers;
+        /* Do not send headers by SAPI */
+        SG(request_info).no_headers = 1;
         if (OG(active)) {
             php_output_end_all();
         }
         php_output_deactivate();
         php_output_activate();
+        SG(request_info).no_headers = no_headers;
     }
     if (task->array_walk_fci) {
         efree(task->array_walk_fci);
diff --git a/tests/swoole_http_server/headers_sent.phpt b/tests/swoole_http_server/headers_sent.phpt
new file mode 100644
index 00000000000..ec994abcd36
--- /dev/null
+++ b/tests/swoole_http_server/headers_sent.phpt
@@ -0,0 +1,49 @@
+--TEST--
+swoole_http_server: headers sent (coroutine disabled)
+--SKIPIF--
+<?php require __DIR__ . '/../include/skipif.inc'; ?>
+--FILE--
+<?php
+require __DIR__ . '/../include/bootstrap.php';
+
+$pm = new ProcessManager;
+
+$pm->parentFunc = function () use ($pm) {
+    $ch = curl_init();
+    curl_setopt($ch, CURLOPT_URL, "http://127.0.0.1:{$pm->getFreePort()}/");
+    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
+    echo curl_exec($ch);
+    echo curl_exec($ch);
+    curl_close($ch);
+    $pm->kill();
+};
+
+$pm->childFunc = function () use ($pm) {
+    $http = new swoole_http_server('127.0.0.1', $pm->getFreePort());
+    $http->set([
+        'worker_num' => 1,
+        'enable_coroutine' => false,
+        'log_file' => '/dev/null'
+    ]);
+    $http->on('workerStart', function () use ($pm) {
+        $pm->wakeup();
+    });
+    $http->on('request', function (swoole_http_request $request, swoole_http_response $response) {
+        ob_start();
+        echo 'Test';
+        $output = ob_get_clean();
+        $response->write('buffered_output=' . $output . "\n");
+        $response->write('headers_sent=' . (int)headers_sent() . "\n");
+        $response->end();
+    });
+    $http->start();
+};
+
+$pm->childFirst();
+$pm->run();
+?>
+--EXPECT--
+buffered_output=Test
+headers_sent=0
+buffered_output=Test
+headers_sent=0
diff --git a/tests/swoole_http_server/headers_sent_coroutine.phpt b/tests/swoole_http_server/headers_sent_coroutine.phpt
new file mode 100644
index 00000000000..8b5d84ea379
--- /dev/null
+++ b/tests/swoole_http_server/headers_sent_coroutine.phpt
@@ -0,0 +1,49 @@
+--TEST--
+swoole_http_server: headers sent (coroutine enabled)
+--SKIPIF--
+<?php require __DIR__ . '/../include/skipif.inc'; ?>
+--FILE--
+<?php
+require __DIR__ . '/../include/bootstrap.php';
+
+$pm = new ProcessManager;
+
+$pm->parentFunc = function () use ($pm) {
+    $ch = curl_init();
+    curl_setopt($ch, CURLOPT_URL, "http://127.0.0.1:{$pm->getFreePort()}/");
+    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
+    echo curl_exec($ch);
+    echo curl_exec($ch);
+    curl_close($ch);
+    $pm->kill();
+};
+
+$pm->childFunc = function () use ($pm) {
+    $http = new swoole_http_server('127.0.0.1', $pm->getFreePort());
+    $http->set([
+        'worker_num' => 1,
+        'enable_coroutine' => true,
+        'log_file' => '/dev/null'
+    ]);
+    $http->on('workerStart', function () use ($pm) {
+        $pm->wakeup();
+    });
+    $http->on('request', function (swoole_http_request $request, swoole_http_response $response) {
+        ob_start();
+        echo 'Test';
+        $output = ob_get_clean();
+        $response->write('buffered_output=' . $output . "\n");
+        $response->write('headers_sent=' . (int)headers_sent() . "\n");
+        $response->end();
+    });
+    $http->start();
+};
+
+$pm->childFirst();
+$pm->run();
+?>
+--EXPECT--
+buffered_output=Test
+headers_sent=0
+buffered_output=Test
+headers_sent=0