diff --git a/libsrc/atari/mcbdefault.s b/libsrc/atari/mcbdefault.s
index 8d60a9ef7..e68dba243 100644
--- a/libsrc/atari/mcbdefault.s
+++ b/libsrc/atari/mcbdefault.s
@@ -21,7 +21,6 @@
         .bss
 
 backup: .res    1
-helper: .res    2
 
 ; ------------------------------------------------------------------------