diff --git a/sdk/android/api/org/webrtc/VideoEncoder.java b/sdk/android/api/org/webrtc/VideoEncoder.java
index 4f97fb0c0d..01c249fa6b 100644
--- a/sdk/android/api/org/webrtc/VideoEncoder.java
+++ b/sdk/android/api/org/webrtc/VideoEncoder.java
@@ -122,7 +122,10 @@ public interface VideoEncoder {
   }
 
   public interface Callback {
-    /** Call to return an encoded frame. */
+    /**
+     * Call to return an encoded frame. It is safe to assume the byte buffer held by |frame| is not
+     * accessed after the call to this method returns.
+     */
     void onEncodedFrame(EncodedImage frame, CodecSpecificInfo info);
   }