diff --git apt-cacher-ng/scripts/expire-caller.pl apt-cacher-ng/scripts/expire-caller.pl
index b03b0f2..2a8d13d 100644
--- apt-cacher-ng/scripts/expire-caller.pl
+++ apt-cacher-ng/scripts/expire-caller.pl
@@ -35,9 +35,7 @@ sub toBase64
    }
       or do
    {
-      # dirty little helper
-      $ENV{"TOBASE64"}=$src;
-      return `/usr/lib/apt-cacher-ng/acngtool encb64 "$TOBASE64"`;
+      return `/usr/lib/apt-cacher-ng/acngtool encb64 "$src"`;
    }
 }