diff --git a/PDP11/pdp11_xq.c b/PDP11/pdp11_xq.c
index c3fbfcc1..6a6352df 100644
--- a/PDP11/pdp11_xq.c
+++ b/PDP11/pdp11_xq.c
@@ -345,7 +345,7 @@ DIB xqa_dib = { IOBA_AUTO, IOLN_XQ, &xq_rd, &xq_wr,
                 1, IVCL (XQ), 0, { &xq_int }, IOLN_XQ };
 
 UNIT xqa_unit[] = {
- { UDATA (&xq_svc, UNIT_IDLE|UNIT_ATTABLE|UNIT_DISABLE, 2047) },  /* receive timer */
+ { UDATA (&xq_svc, UNIT_IDLE|UNIT_ATTABLE, 2047) },  /* receive timer */
  { UDATA (&xq_tmrsvc, UNIT_IDLE|UNIT_DIS, 0) },
  { UDATA (&xq_startsvc, UNIT_DIS, 0) },
 };
@@ -425,7 +425,7 @@ DIB xqb_dib = { IOBA_AUTO, IOLN_XQ, &xq_rd, &xq_wr,
                 1, IVCL (XQ), 0, { &xq_int }, IOLN_XQ };
 
 UNIT xqb_unit[] = {
- { UDATA (&xq_svc, UNIT_IDLE|UNIT_ATTABLE|UNIT_DISABLE, 2047) },  /* receive timer */
+ { UDATA (&xq_svc, UNIT_IDLE|UNIT_ATTABLE, 2047) },  /* receive timer */
  { UDATA (&xq_tmrsvc, UNIT_IDLE|UNIT_DIS, 0) },
  { UDATA (&xq_startsvc, UNIT_DIS, 0) },
 };
diff --git a/PDP11/pdp11_xu.c b/PDP11/pdp11_xu.c
index 8174ecb6..55dc704b 100644
--- a/PDP11/pdp11_xu.c
+++ b/PDP11/pdp11_xu.c
@@ -139,7 +139,7 @@ DIB xua_dib = { IOBA_AUTO, IOLN_XU, &xu_rd, &xu_wr,
                 1, IVCL (XU), VEC_AUTO, {&xu_int}, IOLN_XU };
 
 UNIT xua_unit[] = {
- { UDATA (&xu_svc, UNIT_IDLE|UNIT_ATTABLE|UNIT_DISABLE, 0) },     /* receive timer */
+ { UDATA (&xu_svc, UNIT_IDLE|UNIT_ATTABLE, 0) },     /* receive timer */
  { UDATA (&xu_tmrsvc, UNIT_IDLE|UNIT_DIS, 0) }
 };
 
@@ -245,7 +245,7 @@ DIB xub_dib = { IOBA_AUTO, IOLN_XU, &xu_rd, &xu_wr,
                 1, IVCL (XU), 0, { &xu_int }, IOLN_XU };
 
 UNIT xub_unit[] = {
- { UDATA (&xu_svc, UNIT_IDLE|UNIT_ATTABLE|UNIT_DISABLE, 0) },     /* receive timer */
+ { UDATA (&xu_svc, UNIT_IDLE|UNIT_ATTABLE, 0) },     /* receive timer */
  { UDATA (&xu_tmrsvc, UNIT_IDLE|UNIT_DIS, 0) }
 };