diff --git a/libavformat/flvdec.c b/libavformat/flvdec.c
index 993b5a2e03..dc0edf20d5 100644
--- a/libavformat/flvdec.c
+++ b/libavformat/flvdec.c
@@ -390,7 +390,7 @@ static int amf_parse_object(AVFormatContext *s, AVStream *astream,
     FLVContext *flv = s->priv_data;
     AVIOContext *ioc;
     AMFDataType amf_type;
-    char str_val[256];
+    char str_val[1024];
     double num_val;
 
     num_val  = 0;