diff --git a/src/filterbank_header.c b/src/filterbank_header.c
index ff42998..e45f632 100644
--- a/src/filterbank_header.c
+++ b/src/filterbank_header.c
@@ -10,7 +10,7 @@ void filterbank_header(FILE *outptr) /* includefile */
   /* go no further here if not interested in header parameters */
   if (headerless) return;
   /* broadcast the header parameters to the output stream */
-  if (machine_id != 0) {
+  if (machine_id > -1) {
     send_string("HEADER_START");
     send_string("rawdatafile");
     send_string(inpfile);
diff --git a/src/readpsrfits_hd.c b/src/readpsrfits_hd.c
index 5c2fc46..54fe1b0 100644
--- a/src/readpsrfits_hd.c
+++ b/src/readpsrfits_hd.c
@@ -29,7 +29,7 @@ void readpsrfits_hd(char *filename,int *machine_id,int *telescope_id,int *data_t
   float ch_freq[MX_NCHAN];
 
   // Defaults that are not being set
-  *machine_id=-1;
+  *machine_id=0;
   *data_type = 0;
   *ibeam = 1;
   status=0;