diff --git a/core/jni/android_media_AudioRecord.cpp b/core/jni/android_media_AudioRecord.cpp
index e5c4ba9f23cc0..5928c69f1181f 100644
--- a/core/jni/android_media_AudioRecord.cpp
+++ b/core/jni/android_media_AudioRecord.cpp
@@ -623,7 +623,7 @@ static jboolean android_media_AudioRecord_setInputDevice(
 
     sp<AudioRecord> lpRecorder = getAudioRecord(env, thiz);
     if (lpRecorder == 0) {
-        return 0;
+        return false;
     }
     return lpRecorder->setInputDevice(device_id) == NO_ERROR;
 }
diff --git a/core/jni/android_media_AudioTrack.cpp b/core/jni/android_media_AudioTrack.cpp
index daafd5e46148c..5b52a49bc5208 100644
--- a/core/jni/android_media_AudioTrack.cpp
+++ b/core/jni/android_media_AudioTrack.cpp
@@ -998,6 +998,9 @@ static jboolean android_media_AudioTrack_setOutputDevice(
                 JNIEnv *env,  jobject thiz, jint device_id) {
 
     sp<AudioTrack> lpTrack = getAudioTrack(env, thiz);
+    if (lpTrack == 0) {
+        return false;
+    }
     return lpTrack->setOutputDevice(device_id) == NO_ERROR;
 }