diff --git a/mediapipe/java/com/google/mediapipe/components/AudioDataProducer.java b/mediapipe/java/com/google/mediapipe/components/AudioDataProducer.java
index 4f18f4706..5d042562e 100644
--- a/mediapipe/java/com/google/mediapipe/components/AudioDataProducer.java
+++ b/mediapipe/java/com/google/mediapipe/components/AudioDataProducer.java
@@ -14,8 +14,10 @@
 
 package com.google.mediapipe.components;
 
+import javax.annotation.Nullable;
+
 /** Lightweight abstraction for an object that can produce audio data. */
 public interface AudioDataProducer {
   /** Set the consumer that receives the audio data from this producer. */
-  void setAudioConsumer(AudioDataConsumer consumer);
+  void setAudioConsumer(@Nullable AudioDataConsumer consumer);
 }
diff --git a/mediapipe/java/com/google/mediapipe/components/BUILD b/mediapipe/java/com/google/mediapipe/components/BUILD
index a1ec17548..630bc94c3 100644
--- a/mediapipe/java/com/google/mediapipe/components/BUILD
+++ b/mediapipe/java/com/google/mediapipe/components/BUILD
@@ -71,7 +71,10 @@ android_library(
         "AudioDataProducer.java",
     ],
     visibility = ["//visibility:public"],
-    deps = ["@maven//:com_google_guava_guava"],
+    deps = [
+        "@maven//:com_google_code_findbugs_jsr305",
+        "@maven//:com_google_guava_guava",
+    ],
 )
 
 # MicrophoneHelper that provides access to audio data from a microphone