--- a/lib/libjail/Makefile
+++ b/lib/libjail/Makefile
@@ -5,6 +5,7 @@
 SHLIB_MAJOR= 1
 SRCS=	jail.c jail_getid.c
 INCS=	jail.h
+LDADD+=	-lbsd
 
 MAN=	jail.3