diff --git a/jso/apis/src/main/java/org/teavm/jso/browser/Navigator.java b/jso/apis/src/main/java/org/teavm/jso/browser/Navigator.java
index af955cb8d..eb8c56644 100644
--- a/jso/apis/src/main/java/org/teavm/jso/browser/Navigator.java
+++ b/jso/apis/src/main/java/org/teavm/jso/browser/Navigator.java
@@ -47,4 +47,10 @@ public final class Navigator implements JSObject {
 
     @JSBody(script = "return navigator.hardwareConcurrency")
     public static native int hardwareConcurrency();
+
+    public static native boolean sendBeacon(String url);
+
+    public static native boolean sendBeacon(String url, String data);
+
+    public static native boolean sendBeacon(String url, JSObject data);
 }