diff --git a/Userland/Libraries/LibWeb/UIEvents/MouseEvent.h b/Userland/Libraries/LibWeb/UIEvents/MouseEvent.h
index 88c9ec6b98..a1c3675c3a 100644
--- a/Userland/Libraries/LibWeb/UIEvents/MouseEvent.h
+++ b/Userland/Libraries/LibWeb/UIEvents/MouseEvent.h
@@ -37,6 +37,10 @@ public:
     double client_x() const { return m_client_x; }
     double client_y() const { return m_client_y; }
 
+    // FIXME: Make these actually different from clientX and clientY.
+    double screen_x() const { return m_client_x; }
+    double screen_y() const { return m_client_y; }
+
     double x() const { return client_x(); }
     double y() const { return client_y(); }
 
diff --git a/Userland/Libraries/LibWeb/UIEvents/MouseEvent.idl b/Userland/Libraries/LibWeb/UIEvents/MouseEvent.idl
index eece02e965..94b2c67902 100644
--- a/Userland/Libraries/LibWeb/UIEvents/MouseEvent.idl
+++ b/Userland/Libraries/LibWeb/UIEvents/MouseEvent.idl
@@ -6,6 +6,8 @@ interface MouseEvent : UIEvent {
     readonly attribute double offsetY;
     readonly attribute double clientX;
     readonly attribute double clientY;
+    readonly attribute double screenX;
+    readonly attribute double screenY;
     readonly attribute double x;
     readonly attribute double y;
 
@@ -23,4 +25,4 @@ dictionary MouseEventInit : EventModifierInit {
 
     short button = 0;
 
-};
\ No newline at end of file
+};