diff --git a/VAX/vax610_stddev.c b/VAX/vax610_stddev.c
index 6d54014c..a89c7492 100644
--- a/VAX/vax610_stddev.c
+++ b/VAX/vax610_stddev.c
@@ -337,8 +337,8 @@ t_stat tti_svc (UNIT *uptr)
 {
 int32 c;
 
-sim_clock_coschedule (uptr, KBD_WAIT (uptr->wait, tmr_poll));
-                                                        /* continue poll */
+sim_clock_coschedule (uptr, tmxr_poll);                 /* continue poll */
+
 if ((tti_csr & CSR_DONE) &&                             /* input still pending and < 500ms? */
     ((sim_os_msec () - tti_buftime) < 500))
      return SCPE_OK;
diff --git a/VAX/vax630_stddev.c b/VAX/vax630_stddev.c
index a0bfd7c6..30d5b955 100644
--- a/VAX/vax630_stddev.c
+++ b/VAX/vax630_stddev.c
@@ -272,8 +272,8 @@ t_stat tti_svc (UNIT *uptr)
 {
 int32 c;
 
-sim_clock_coschedule (uptr, KBD_WAIT (uptr->wait, tmr_poll));
-                                                        /* continue poll */
+sim_clock_coschedule (uptr, tmxr_poll);                 /* continue poll */
+
 if ((tti_csr & CSR_DONE) &&                             /* input still pending and < 500ms? */
     ((sim_os_msec () - tti_buftime) < 500))
      return SCPE_OK;
diff --git a/VAX/vax730_stddev.c b/VAX/vax730_stddev.c
index b6262b45..d04420e0 100644
--- a/VAX/vax730_stddev.c
+++ b/VAX/vax730_stddev.c
@@ -517,8 +517,8 @@ t_stat tti_svc (UNIT *uptr)
 {
 int32 c;
 
-sim_clock_coschedule (uptr, KBD_WAIT (uptr->wait, tmr_poll));
-                                                        /* continue poll */
+sim_clock_coschedule (uptr, tmxr_poll);                 /* continue poll */
+
 if ((tti_csr & CSR_DONE) &&                             /* input still pending and < 500ms? */
     ((sim_os_msec () - tti_buftime) < 500))
      return SCPE_OK;
diff --git a/VAX/vax750_stddev.c b/VAX/vax750_stddev.c
index e7e1622a..7e89ea4d 100644
--- a/VAX/vax750_stddev.c
+++ b/VAX/vax750_stddev.c
@@ -511,8 +511,8 @@ t_stat tti_svc (UNIT *uptr)
 {
 int32 c;
 
-sim_clock_coschedule (uptr, KBD_WAIT (uptr->wait, tmr_poll));
-                                                        /* continue poll */
+sim_clock_coschedule (uptr, tmxr_poll);                 /* continue poll */
+
 if ((tti_csr & CSR_DONE) &&                             /* input still pending and < 500ms? */
     ((sim_os_msec () - tti_buftime) < 500))
      return SCPE_OK;
diff --git a/VAX/vax780_stddev.c b/VAX/vax780_stddev.c
index e9fb5952..3805fd08 100644
--- a/VAX/vax780_stddev.c
+++ b/VAX/vax780_stddev.c
@@ -482,6 +482,7 @@ t_stat tti_svc (UNIT *uptr)
 int32 c;
 
 sim_clock_coschedule (uptr, tmxr_poll);                 /* continue poll */
+
 if ((tti_csr & CSR_DONE) &&                             /* input still pending and < 500ms? */
     ((sim_os_msec () - tti_buftime) < 500))
      return SCPE_OK;
diff --git a/VAX/vax_stddev.c b/VAX/vax_stddev.c
index 30227dd7..a69de74c 100644
--- a/VAX/vax_stddev.c
+++ b/VAX/vax_stddev.c
@@ -335,8 +335,8 @@ t_stat tti_svc (UNIT *uptr)
 {
 int32 c;
 
-sim_clock_coschedule (uptr, KBD_WAIT (uptr->wait, tmr_poll));
-                                                        /* continue poll */
+sim_clock_coschedule (uptr, tmxr_poll);                 /* continue poll */
+
 if ((tti_csr & CSR_DONE) &&                             /* input still pending and < 500ms? */
     ((sim_os_msec () - tti_buftime) < 500))
      return SCPE_OK;