diff --git a/PDP8/pdp8_ct.c b/PDP8/pdp8_ct.c
index f35c0f88..52017b7d 100644
--- a/PDP8/pdp8_ct.c
+++ b/PDP8/pdp8_ct.c
@@ -201,8 +201,8 @@ REG ct_reg[] = {
     { DRDATA (STIME, ct_stime, 24), PV_LEFT + REG_NZ },
     { DRDATA (CTIME, ct_ctime, 24), PV_LEFT + REG_NZ },
     { FLDATA (STOP_IOE, ct_stopioe, 0) },
-    { URDATA (UFNC, ct_unit[0].FNC, 8, 4, 0, CT_NUMDR, 0), REG_HRO },
-    { URDATA (UST, ct_unit[0].UST, 8, 2, 0, CT_NUMDR, 0), REG_HRO },
+    { URDATA (UFNC, ct_unit[0].FNC, 8, 4, 0, CT_NUMDR, REG_HRO ) },
+    { URDATA (UST, ct_unit[0].UST, 8, 2, 0, CT_NUMDR, REG_HRO ) },
     { URDATA (POS, ct_unit[0].pos, 10, T_ADDR_W, 0,
               CT_NUMDR, PV_LEFT | REG_RO) },
     { FLDATA (DEVNUM, ct_dib.dev, 6), REG_HRO },