diff --git a/I7000/i7000_defs.h b/I7000/i7000_defs.h
index 78bd2851..a5293ebf 100644
--- a/I7000/i7000_defs.h
+++ b/I7000/i7000_defs.h
@@ -269,7 +269,6 @@ extern DEBTAB crd_debug[];
 #define UNIT_V_SET      (UNIT_V_UF + 5)
 #define CHAN_SET        (1 << UNIT_V_SET)
 
-extern t_value  assembly[NUM_CHAN];             /* Assembly register */
 /* I/O routine functions */
 /* Channel half of controls */
 /* Channel status */
diff --git a/I7000/i7010_chan.c b/I7000/i7010_chan.c
index 763c8546..4b936adf 100644
--- a/I7000/i7010_chan.c
+++ b/I7000/i7010_chan.c
@@ -64,7 +64,7 @@ uint8               cmd[NUM_CHAN];              /* Current command */
 uint16              irqdev[NUM_CHAN];           /* Device to generate interupts
                                                    for channel */
 uint32              chunit[NUM_CHAN];           /* Channel unit */
-uint32              assembly[NUM_CHAN];         /* Assembly register */
+uint8               assembly[NUM_CHAN];         /* Assembly register */
 uint32              chan_flags[NUM_CHAN];       /* Unit status */
 extern uint8        chan_io_status[NUM_CHAN];
 extern uint8        inquiry;
diff --git a/I7000/i7090_defs.h b/I7000/i7090_defs.h
index 56815369..a02e13d7 100644
--- a/I7000/i7090_defs.h
+++ b/I7000/i7090_defs.h
@@ -29,6 +29,7 @@
 #define ReadP(x)        (M[x])
 #define WriteP(x,y)     if (MEM_ADDR_OK (x)) M[x] = y
 extern t_uint64         M[MAXMEMSIZE];
+extern t_uint64         assembly[NUM_CHAN];
 
 /* Processor specific masks */
 #define ONEBIT          00200000000000LL