diff --git a/PDP1/pdp1_dt.c b/PDP1/pdp1_dt.c
index 39478e80..856c2393 100644
--- a/PDP1/pdp1_dt.c
+++ b/PDP1/pdp1_dt.c
@@ -1023,7 +1023,6 @@ else if (uptr->flags & UNIT_11FMT)
     sim_printf ("16b format");
 else sim_printf ("18b/36b format");
 sim_printf (", buffering file in memory\n");
-sim_fseek (uptr->fileref, 0, SEEK_SET);                 /* start at the beginning of file */
 if (uptr->flags & UNIT_8FMT) {                          /* 12b? */
     for (ba = 0; ba < uptr->capac; ) {                  /* loop thru file */
         k = fxread (pdp8b, sizeof (uint16), D8_NBSIZE, uptr->fileref);
diff --git a/PDP10/kx10_dt.c b/PDP10/kx10_dt.c
index 0e82c56d..449e7889 100644
--- a/PDP10/kx10_dt.c
+++ b/PDP10/kx10_dt.c
@@ -1182,7 +1182,6 @@ t_stat dt_attach (UNIT *uptr, CONST char *cptr)
         sim_printf ("16b format");
     else sim_printf ("18b/36b format");
     sim_printf (", buffering file in memory\n");
-    (void)sim_fseek (uptr->fileref, 0, SEEK_SET);           /* start at the beginning of file */
     uptr->io_flush = dt_flush;
     if (uptr->flags & UNIT_8FMT) {                          /* 12b? */
         for (ba = 0; ba < uptr->capac; ) {                  /* loop thru file */
diff --git a/PDP10/pdp6_dtc.c b/PDP10/pdp6_dtc.c
index 4ad93c93..c4e1567a 100644
--- a/PDP10/pdp6_dtc.c
+++ b/PDP10/pdp6_dtc.c
@@ -1194,7 +1194,6 @@ dtc_attach (UNIT *uptr, CONST char *cptr)
         sim_printf ("16b format");
     else sim_printf ("18b/36b format");
     sim_printf (", buffering file in memory\n");
-    (void)sim_fseek (uptr->fileref, 0, SEEK_SET);           /* start at the beginning of file */
     uptr->WRITTEN = 0;
     uptr->io_flush = dtc_flush;
     if (uptr->flags & UNIT_8FMT) {                          /* 12b? */
diff --git a/PDP11/pdp11_tc.c b/PDP11/pdp11_tc.c
index 5e27c756..8012651a 100644
--- a/PDP11/pdp11_tc.c
+++ b/PDP11/pdp11_tc.c
@@ -1299,7 +1299,6 @@ else if (uptr->flags & UNIT_11FMT)
     sim_printf ("16b format");
 else sim_printf ("18b/36b format");
 sim_printf (", buffering file in memory\n");
-(void)sim_fseek (uptr->fileref, 0, SEEK_SET);           /* start at the beginning of file */
 uptr->io_flush = dt_flush;
 if (uptr->flags & UNIT_8FMT) {                          /* 12b? */
     for (ba = 0; ba < uptr->capac; ) {                  /* loop thru file */
diff --git a/PDP18B/pdp18b_dt.c b/PDP18B/pdp18b_dt.c
index 1c5922b1..4b42a0ec 100644
--- a/PDP18B/pdp18b_dt.c
+++ b/PDP18B/pdp18b_dt.c
@@ -1458,7 +1458,6 @@ else if (uptr->flags & UNIT_11FMT)
     sim_printf ("16b format");
 else sim_printf ("18b/36b format");
 sim_printf (", buffering file in memory\n");
-(void)sim_fseek (uptr->fileref, 0, SEEK_SET);           /* start at the beginning of file */
 uptr->io_flush = dt_flush;
 if (uptr->flags & UNIT_8FMT) {                          /* 12b? */
     for (ba = 0; ba < uptr->capac; ) {                  /* loop thru file */
diff --git a/PDP8/pdp8_dt.c b/PDP8/pdp8_dt.c
index 7d4f1e8c..7ac2330a 100644
--- a/PDP8/pdp8_dt.c
+++ b/PDP8/pdp8_dt.c
@@ -1248,7 +1248,6 @@ else if (uptr->flags & UNIT_11FMT)
     sim_printf ("16b format");
 else sim_printf ("18b/36b format");
 sim_printf (", buffering file in memory\n");
-(void)sim_fseek (uptr->fileref, 0, SEEK_SET);           /* start at the beginning of file */
 uptr->io_flush = dt_flush;
 if (uptr->flags & UNIT_8FMT)                            /* 12b? */
     uptr->hwmark = fxread (uptr->filebuf, sizeof (uint16),
diff --git a/PDP8/pdp8_td.c b/PDP8/pdp8_td.c
index e01daff8..7ae902f0 100644
--- a/PDP8/pdp8_td.c
+++ b/PDP8/pdp8_td.c
@@ -808,7 +808,6 @@ else if (uptr->flags & UNIT_11FMT)
     sim_printf ("16b format");
 else sim_printf ("18b/36b format");
 sim_printf (", buffering file in memory\n");
-(void)sim_fseek (uptr->fileref, 0, SEEK_SET);           /* start at the beginning of file */
 uptr->io_flush = td_flush;
 if (uptr->flags & UNIT_8FMT)                            /* 12b? */
     uptr->hwmark = fxread (uptr->filebuf, sizeof (uint16),