diff --git a/libmpdemux/demux_nsv.c b/libmpdemux/demux_nsv.c
index 94a0e3f68f..f06cff7b19 100644
--- a/libmpdemux/demux_nsv.c
+++ b/libmpdemux/demux_nsv.c
@@ -28,7 +28,7 @@ typedef struct {
     unsigned char fps;            
 } nsv_priv_t;
 
-#define HEADER_SEARCH_SIZE 65000
+#define HEADER_SEARCH_SIZE 256000
 
 
 /**