diff --git a/libbb/Kbuild.src b/libbb/Kbuild.src
index f204816..7fb6872 100644
--- a/libbb/Kbuild.src
+++ b/libbb/Kbuild.src
@@ -142,6 +142,7 @@
 lib-$(CONFIG_DELGROUP) += update_passwd.o
 lib-$(CONFIG_DELUSER) += update_passwd.o
 
+lib-$(CONFIG_FTPD) += correct_password.o
 lib-$(CONFIG_PASSWD) += pw_encrypt.o update_passwd.o obscure.o
 lib-$(CONFIG_CHPASSWD) += pw_encrypt.o update_passwd.o
 lib-$(CONFIG_CRYPTPW) += pw_encrypt.o