diff --git a/asminc/c128.inc b/asminc/c128.inc
index 2852631f3..749b4168c 100644
--- a/asminc/c128.inc
+++ b/asminc/c128.inc
@@ -7,6 +7,7 @@
 ; Zero page, Commodore stuff
 
 TXTPTR          := $3D          ; Pointer into BASIC source code
+STATUS          := $90          ; Kernal I/O completion status
 TIME            := $A0          ; 60HZ clock
 FNAM_LEN        := $B7          ; Length of filename
 SECADR          := $B9          ; Secondary address
diff --git a/asminc/c64.inc b/asminc/c64.inc
index 1d10f673d..2cfc50db4 100644
--- a/asminc/c64.inc
+++ b/asminc/c64.inc
@@ -9,6 +9,7 @@
 VARTAB          := $2D          ; Pointer to start of BASIC variables
 MEMSIZE         := $37          ; Pointer to highest BASIC RAM location (+1)
 TXTPTR          := $7A          ; Pointer into BASIC source code
+STATUS          := $90          ; Kernal I/O completion status
 TIME            := $A0          ; 60 HZ clock
 FNAM_LEN        := $B7          ; Length of filename
 SECADR          := $B9          ; Secondary address
diff --git a/asminc/plus4.inc b/asminc/plus4.inc
index 774722e93..6c6017a78 100644
--- a/asminc/plus4.inc
+++ b/asminc/plus4.inc
@@ -10,6 +10,7 @@ TMPPTR          := $22          ; Temporary ptr used by BASIC
 VARTAB          := $2D          ; Pointer to start of BASIC variables
 MEMSIZE         := $37          ; Pointer to highest BASIC RAM location (+1)
 TXTPTR          := $3B          ; Pointer into BASIC source code
+STATUS          := $90          ; Kernal I/O completion status
 TIME            := $A3          ; 60HZ clock
 FNAM_LEN        := $AB          ; Length of filename
 LFN             := $AC          ; Logical file number
diff --git a/asminc/vic20.inc b/asminc/vic20.inc
index b82874f56..fa9fdfa8d 100644
--- a/asminc/vic20.inc
+++ b/asminc/vic20.inc
@@ -9,6 +9,7 @@
 VARTAB          := $2D          ; Pointer to start of BASIC variables
 MEMSIZE         := $37          ; Pointer to highest BASIC RAM location (+1)
 TXTPTR          := $7A          ; Pointer into BASIC source code
+STATUS          := $90          ; Kernal I/O completion status
 TIME            := $A0          ; 60HZ clock
 FNAM_LEN        := $B7          ; Length of filename
 SECADR          := $B9          ; Secondary address