diff --git a/ChainLoader.a b/ChainLoader.a
index 8fac186..56f353c 100644
--- a/ChainLoader.a
+++ b/ChainLoader.a
@@ -93,7 +93,7 @@ GoHereFromReadTrap
             lea     $32(SP),SP
             move.w  $18(A4),D0 ; ioRefNum
             dc.w    $A03E ; _DrvrRemove
-            move.w  #-52,D0 ; ioRefNum      ; also delete .ATBOOT for neatness
+            move.w  #-51,D0 ; ioRefNum      ; also delete .ATBOOT for neatness
             dc.w    $A03E ; _DrvrRemove
 
     ; A3 = our driver in sysheap (plus user record)