diff --git a/libraries/exoplayer_ima/src/main/java/androidx/media3/exoplayer/ima/ImaServerSideAdInsertionMediaSource.java b/libraries/exoplayer_ima/src/main/java/androidx/media3/exoplayer/ima/ImaServerSideAdInsertionMediaSource.java
index a6d2390860..d6278fe69a 100644
--- a/libraries/exoplayer_ima/src/main/java/androidx/media3/exoplayer/ima/ImaServerSideAdInsertionMediaSource.java
+++ b/libraries/exoplayer_ima/src/main/java/androidx/media3/exoplayer/ima/ImaServerSideAdInsertionMediaSource.java
@@ -607,7 +607,7 @@ public final class ImaServerSideAdInsertionMediaSource extends CompositeMediaSou
   }
 
   @MainThread
-  @EnsuresNonNull("contentTimeline")
+  @EnsuresNonNull("this.contentTimeline")
   private void setContentTimeline(Timeline contentTimeline) {
     if (contentTimeline.equals(this.contentTimeline)) {
       return;