diff --git a/libraries/common/src/main/java/androidx/media3/common/VideoFrameProcessor.java b/libraries/common/src/main/java/androidx/media3/common/VideoFrameProcessor.java
index 6c8549a75b..17bf80b7ab 100644
--- a/libraries/common/src/main/java/androidx/media3/common/VideoFrameProcessor.java
+++ b/libraries/common/src/main/java/androidx/media3/common/VideoFrameProcessor.java
@@ -333,6 +333,8 @@ public interface VideoFrameProcessor {
    *
    * @throws UnsupportedOperationException If the {@code VideoFrameProcessor} does not accept
    *     {@linkplain #INPUT_TYPE_SURFACE surface input}.
+   * @throws IllegalStateException If {@link #registerInputStream} is not called before calling this
+   *     method.
    */
   void flush();