diff --git a/src/wp-includes/rest-api.php b/src/wp-includes/rest-api.php
index d4c0aca..3a5fc1a 100644
--- a/src/wp-includes/rest-api.php
+++ b/src/wp-includes/rest-api.php
@@ -431,10 +431,9 @@ function rest_handle_options_request( $response, $handler, $request ) {
 		}
 
 		$data = $handler->get_data_for_route( $route, $endpoints, 'help' );
-		$accept = array_merge( $accept, $data['methods'] );
+		$response->set_matched_route( $route );
 		break;
 	}
-	$response->header( 'Accept', implode( ', ', $accept ) );
 
 	$response->set_data( $data );
 	return $response;
diff --git a/tests/phpunit/tests/rest-api/rest-server.php b/tests/phpunit/tests/rest-api/rest-server.php
index 7d5cf68..3c2c930 100644
--- a/tests/phpunit/tests/rest-api/rest-server.php
+++ b/tests/phpunit/tests/rest-api/rest-server.php
@@ -285,6 +285,29 @@ class Tests_REST_Server extends WP_Test_REST_TestCase {
 		$this->assertEquals( $sent_headers['Allow'], 'POST' );
 	}
 
+	public function test_allow_header_sent_on_options_request() {
+		register_rest_route( 'test-ns', '/test', array(
+			array(
+				'methods'  => array( 'GET' ),
+				'callback' => '__return_null',
+			),
+			array(
+				'methods'  => array( 'POST' ),
+				'callback' => '__return_null',
+				'permission_callback' => '__return_null',
+			),
+		) );
+
+		$request = new WP_REST_Request( 'OPTIONS', '/test-ns/test' );
+		$response = $this->server->dispatch( $request );
+
+		$result = apply_filters( 'rest_post_dispatch', rest_ensure_response( $response ), $this->server, $request );
+
+		$headers = $result->get_headers();
+
+		$this->assertEquals( 'GET', $headers['Allow'] );
+	}
+
 	public function permission_denied() {
 		return new WP_Error( 'forbidden', 'You are not allowed to do this', array( 'status' => 403 ) );
 	}