diff --git a/Ladybird/WebContentView.cpp b/Ladybird/WebContentView.cpp
index f6394145bf..6281e2b6d7 100644
--- a/Ladybird/WebContentView.cpp
+++ b/Ladybird/WebContentView.cpp
@@ -36,6 +36,7 @@
 #include <LibGfx/SystemTheme.h>
 #include <LibJS/Runtime/ConsoleObject.h>
 #include <LibMain/Main.h>
+#include <LibWeb/Crypto/Crypto.h>
 #include <LibWeb/Loader/ContentFilter.h>
 #include <LibWebView/WebContentClient.h>
 #include <QApplication>
@@ -630,6 +631,9 @@ void WebContentView::create_client()
         });
     };
 
+    m_client_state.client_handle = Web::Crypto::generate_random_uuid().release_value_but_fixme_should_propagate_errors();
+    client().async_set_window_handle(m_client_state.client_handle);
+
     client().async_set_device_pixels_per_css_pixel(m_device_pixel_ratio);
     update_palette();
     client().async_update_system_fonts(Gfx::FontDatabase::default_font_query(), Gfx::FontDatabase::fixed_width_font_query(), Gfx::FontDatabase::window_title_font_query());