diff --git a/libavformat/nutenc.c b/libavformat/nutenc.c
index 007b65ce59..6896ead4ce 100644
--- a/libavformat/nutenc.c
+++ b/libavformat/nutenc.c
@@ -184,13 +184,14 @@ static inline void put_s_trace(ByteIOContext *bc, int64_t v, char *file, char *f
 #define put_s(bc, v)  put_s_trace(bc, v, __FILE__, __PRETTY_FUNCTION__, __LINE__)
 #endif
 
+//FIXME remove calculate_checksum
 static void put_packet(NUTContext *nut, ByteIOContext *bc, ByteIOContext *dyn_bc, int calculate_checksum){
     uint8_t *dyn_buf=NULL;
     int dyn_size= url_close_dyn_buf(dyn_bc, &dyn_buf);
     int forw_ptr= dyn_size + 4*calculate_checksum;
 
     if(forw_ptr > 4096)
-        init_checksum(bc, av_crc04C11DB7_update, 0);
+        init_checksum(bc, av_crc04C11DB7_update, 0); //FIXME this is supposed to include the start code
     put_v(bc, forw_ptr);
     if(forw_ptr > 4096)
         put_le32(bc, get_checksum(bc));