diff --git a/plugins/prebuffer-mixin/src/main.ts b/plugins/prebuffer-mixin/src/main.ts
index 3609086ca..a94d7717c 100644
--- a/plugins/prebuffer-mixin/src/main.ts
+++ b/plugins/prebuffer-mixin/src/main.ts
@@ -488,7 +488,7 @@ class PrebufferSession {
             return;
           }
 
-          session.on('killed', kill);
+          session.once('killed', kill);
 
           const { resetActivityTimer } = setupActivityTimer('mp4', kill, session, rbo.timeout);