diff --git a/Libraries/LibCore/Notifier.cpp b/Libraries/LibCore/Notifier.cpp
index 7d39ae0e89..655a73ed1b 100644
--- a/Libraries/LibCore/Notifier.cpp
+++ b/Libraries/LibCore/Notifier.cpp
@@ -46,12 +46,22 @@ Notifier::~Notifier()
 
 void Notifier::set_enabled(bool enabled)
 {
+    if (m_fd < 0)
+        return;
     if (enabled)
         Core::EventLoop::register_notifier({}, *this);
     else
         Core::EventLoop::unregister_notifier({}, *this);
 }
 
+void Notifier::close()
+{
+    if (m_fd < 0)
+        return;
+    set_enabled(false);
+    m_fd = -1;
+}
+
 void Notifier::event(Core::Event& event)
 {
     if (event.type() == Core::Event::NotifierRead && on_ready_to_read) {
diff --git a/Libraries/LibCore/Notifier.h b/Libraries/LibCore/Notifier.h
index fd40053284..b197b55204 100644
--- a/Libraries/LibCore/Notifier.h
+++ b/Libraries/LibCore/Notifier.h
@@ -48,6 +48,8 @@ public:
     Function<void()> on_ready_to_read;
     Function<void()> on_ready_to_write;
 
+    void close();
+
     int fd() const { return m_fd; }
     unsigned event_mask() const { return m_event_mask; }
     void set_event_mask(unsigned event_mask) { m_event_mask = event_mask; }