diff --git a/media/libmediaplayerservice/nuplayer/HTTPLiveSource.cpp b/media/libmediaplayerservice/nuplayer/HTTPLiveSource.cpp
index a003c81..02e9caf 100644
--- a/media/libmediaplayerservice/nuplayer/HTTPLiveSource.cpp
+++ b/media/libmediaplayerservice/nuplayer/HTTPLiveSource.cpp
@@ -98,6 +98,10 @@
 }
 
 sp<AMessage> NuPlayer::HTTPLiveSource::getFormat(bool audio) {
+    if (mLiveSession == NULL) {
+        return NULL;
+    }
+
     sp<AMessage> format;
     status_t err = mLiveSession->getStreamFormat(
             audio ? LiveSession::STREAMTYPE_AUDIO