diff --git a/asminc/vic20.inc b/asminc/vic20.inc
index 91da083f1..41a935238 100644
--- a/asminc/vic20.inc
+++ b/asminc/vic20.inc
@@ -11,8 +11,8 @@ 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          ; Second address
-DEVNUM          := $BA          ; Device number (first address)
+SECADR          := $B9          ; Secondary address
+DEVNUM          := $BA          ; Device number
 FNAM            := $BB          ; Pointer to filename
 KEY_COUNT       := $C6          ; Number of keys in input buffer
 RVS             := $C7          ; Reverse flag