diff --git a/miscutils/Config.in b/miscutils/Config.in
index 4055543..5afeb2a 100644
--- a/miscutils/Config.in
+++ b/miscutils/Config.in
@@ -299,6 +299,7 @@
 config READAHEAD
 	bool "readahead"
 	default n
+	depends on LFS
 	help
 	  Preload the files listed on the command line into RAM cache so that
 	  subsequent reads on these files will not block on disk I/O.