diff --git a/PDP10/ka10_defs.h b/PDP10/ka10_defs.h
index 7550967..1e6f9f5 100644
--- a/PDP10/ka10_defs.h
+++ b/PDP10/ka10_defs.h
@@ -363,7 +363,7 @@ int  df10_write(struct df10 *df);
 #define NUM_DEVS_RP     2
 #define NUM_DEVS_RS     0
 #define NUM_DEVS_TU     1
-#define NUM_DEVS_PD     1
+#define NUM_DEVS_PD     ITS
 /* Global data */
 
 extern t_bool sim_idle_enab;
diff --git a/PDP10/ka10_mt.c b/PDP10/ka10_mt.c
index bc73b1d..0547bcb 100644
--- a/PDP10/ka10_mt.c
+++ b/PDP10/ka10_mt.c
@@ -122,7 +122,6 @@
 t_stat         mt_devio(uint32 dev, uint64 *data);
 t_stat         mt_srv(UNIT *);
 t_stat         mt_boot(int32, DEVICE *);
-void           mt_ini(UNIT *, t_bool);
 t_stat         set_mta (UNIT *uptr, int32 val, CONST char *cptr, void *desc) ;
 t_stat         show_mta (FILE *st, UNIT *uptr, int32 val, CONST void *desc);
 t_stat         mt_reset(DEVICE *);
diff --git a/PDP10/ka10_pd.c b/PDP10/ka10_pd.c
index 86aab3f..74389d0 100644
--- a/PDP10/ka10_pd.c
+++ b/PDP10/ka10_pd.c
@@ -43,7 +43,7 @@ t_stat         pd_set_off(UNIT *uptr, int32 val, CONST char *cptr, void *desc);
 t_stat         pd_show_on(FILE *st, UNIT *uptr, int32 val, CONST void *desc);
 
 UNIT                pd_unit[] = {
-    {UDATA(NULL, UNIT_FIX, 0)},  /* 0 */
+    {UDATA(NULL, UNIT_DISABLE , 0)},  /* 0 */
 };
 DIB pd_dib = {PD_DEVNUM, 1, &pd_devio, NULL};
 
diff --git a/makefile b/makefile
index 1d6d1e4..198c85b 100644
--- a/makefile
+++ b/makefile
@@ -1110,7 +1110,7 @@ KI10 = ${KA10D}/ka10_cpu.c ${KA10D}/ka10_sys.c ${KA10D}/ka10_df.c \
 	${KA10D}/ka10_lp.c ${KA10D}/ka10_pt.c ${KA10D}/ka10_dc.c  \
 	${KA10D}/ka10_rp.c ${KA10D}/ka10_rc.c ${KA10D}/ka10_dt.c \
 	${KA10D}/ka10_dk.c ${KA10D}/ka10_cr.c ${KA10D}/ka10_cp.c \
-	${KA10D}/ka10_tu.c ${KA10D}/ka10_rs.c
+	${KA10D}/ka10_tu.c ${KA10D}/ka10_rs.c ${KA10D}/ka10_pd.c
 KI10_OPT = -DKI=1 -DUSE_INT64 -I $(KA10D) -DUSE_SIM_CARD