diff --git a/libraries/effect/src/main/java/androidx/media3/effect/VideoCompositor.java b/libraries/effect/src/main/java/androidx/media3/effect/VideoCompositor.java
index e87c48ac07..f9c78e3ad4 100644
--- a/libraries/effect/src/main/java/androidx/media3/effect/VideoCompositor.java
+++ b/libraries/effect/src/main/java/androidx/media3/effect/VideoCompositor.java
@@ -27,6 +27,8 @@ import java.util.List;
  * output frames.
  *
  * <p>Input and output are provided via OpenGL textures.
+ *
+ * <p>Methods may be called from any thread.
  */
 @UnstableApi
 public interface VideoCompositor extends GlTextureProducer {