diff --git a/BESM6/besm6_tty.c b/BESM6/besm6_tty.c
index 779c00a1..87dee8e5 100644
--- a/BESM6/besm6_tty.c
+++ b/BESM6/besm6_tty.c
@@ -491,7 +491,7 @@ DEVICE tty_dev = {
     "TTY", tty_unit, tty_reg, tty_mod,
     27, 2, 1, 1, 2, 1,
     NULL, NULL, &tty_reset, NULL, &tty_attach, &tty_detach,
-    NULL, DEV_NET|DEV_DEBUG
+    NULL, DEV_MUX|DEV_DEBUG
 };
 
 void tty_send (uint32 mask)
diff --git a/NOVA/nova_qty.c b/NOVA/nova_qty.c
index cbea3e6f..24fe5477 100644
--- a/NOVA/nova_qty.c
+++ b/NOVA/nova_qty.c
@@ -861,7 +861,7 @@ DEVICE  alm_dev =
         1, 10, 31, 1, 8, 8,
         NULL, NULL, &alm_reset,
         NULL, &qty_attach, &qty_detach,
-        &alm_dib, (DEV_DISABLE | DEV_NET)
+        &alm_dib, (DEV_DISABLE | DEV_MUX)
         } ;
 
 int alm_section     = -1 ;      /*  current line "section" (0 = RCV, 1 = XMT)  */
diff --git a/sigma/sigma_coc.c b/sigma/sigma_coc.c
index 97f4bf4b..73c2972c 100644
--- a/sigma/sigma_coc.c
+++ b/sigma/sigma_coc.c
@@ -157,7 +157,7 @@ DEVICE mux_dev = {
     2, 10, 31, 1, 16, 8,
     &tmxr_ex, &tmxr_dep, &mux_reset,
     NULL, &mux_attach, &mux_detach,
-    &mux_dib, DEV_NET | DEV_DISABLE
+    &mux_dib, DEV_MUX | DEV_DISABLE
     };
 
 /* MUXL data structures