diff --git a/busybox.config b/busybox.config
index 8292315..9e70554 100644
--- a/busybox.config
+++ b/busybox.config
@@ -54,6 +54,7 @@ X CONFIG_HWCLOCK
 X CONFIG_SWITCH_ROOT
 X CONFIG_TOUCH
 X CONFIG_LESS
+X CONFIG_TAC
 
 X CONFIG_PING
 X CONFIG_TOP