diff --git a/libarmbox/playback_libeplayer3.cpp b/libarmbox/playback_libeplayer3.cpp
index 02cbfdc..c783054 100644
--- a/libarmbox/playback_libeplayer3.cpp
+++ b/libarmbox/playback_libeplayer3.cpp
@@ -868,7 +868,7 @@ AVFormatContext *cPlayback::GetAVFormatContext()
 void cPlayback::ReleaseAVFormatContext()
 {
 	avft->streams = NULL;
-	avft->nb_streams = NULL;
+	avft->nb_streams = 0;
 }
 
 #if 0
diff --git a/libeplayer3/container/container_ffmpeg.c b/libeplayer3/container/container_ffmpeg.c
index aef811c..4f447e7 100644
--- a/libeplayer3/container/container_ffmpeg.c
+++ b/libeplayer3/container/container_ffmpeg.c
@@ -3334,7 +3334,7 @@ static int container_ffmpeg_av_context(Context_t *context, AVFormatContext *ext_
 	else
 	{
 		ext_avContext->streams = NULL;
-		ext_avContext->nb_streams = NULL;
+		ext_avContext->nb_streams = 0;
 	}
 
 	return cERR_CONTAINER_FFMPEG_NO_ERROR;