diff --git a/src/Makefile.am b/src/Makefile.am
index 092d8ce..2f06375 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -33,7 +33,7 @@ AM_CPPFLAGS =							\
 	-DSYSTEM_INIT_FILE=\"${datadir}/X11/twm/system.twmrc\"
 
 AM_CFLAGS = $(TWM_CFLAGS)
-twm_LDADD = $(TWM_LIBS)
+twm_LDADD = $(TWM_LIBS) -lbsd
 
 twm_SOURCES =		\
         add_window.c	\