diff --git a/components/script/dom/mediasession.rs b/components/script/dom/mediasession.rs
index 70e63f3fd58..6fdfd9b27c4 100644
--- a/components/script/dom/mediasession.rs
+++ b/components/script/dom/mediasession.rs
@@ -15,6 +15,7 @@ use crate::dom::window::Window;
 use crate::script_thread::ScriptThread;
 use dom_struct::dom_struct;
 use msg::constellation_msg::TopLevelBrowsingContextId;
+use script_traits::MediaSessionActionType;
 use std::rc::Rc;
 
 #[dom_struct]
@@ -46,6 +47,10 @@ impl MediaSession {
             MediaSessionBinding::Wrap,
         )
     }
+
+    pub fn handle_action(&self, action: MediaSessionActionType) {
+        // TODO
+    }
 }
 
 impl MediaSessionMethods for MediaSession {
diff --git a/components/script/script_thread.rs b/components/script/script_thread.rs
index 1c1a7bd9538..ec1f5852060 100644
--- a/components/script/script_thread.rs
+++ b/components/script/script_thread.rs
@@ -3941,7 +3941,10 @@ impl ScriptThread {
         browsing_context_id: TopLevelBrowsingContextId,
         action: MediaSessionActionType,
     ) {
-        // TODO
+        match self.media_sessions.borrow().get(&browsing_context_id) {
+            Some(session) => session.handle_action(action),
+            None => warn!("No MediaSession for this browsing context"),
+        };
     }
 
     pub fn enqueue_microtask(job: Microtask) {