diff --git a/libguile/lightning/configure.ac b/libguile/lightning/configure.ac
index d231bab19..5e87c3f71 100644
--- a/libguile/lightning/configure.ac
+++ b/libguile/lightning/configure.ac
@@ -2,13 +2,6 @@ LIGHTNING_CFLAGS=
 
 AC_CHECK_FUNCS(mremap ffsl isnan isinf,,)
 
-case "$host_os" in
-    *bsd*|osf*)		SHLIB=""	;;
-    *hpux*)		SHLIB="-ldld"	;;
-    *)			SHLIB="-ldl"	;;
-esac
-AC_SUBST(SHLIB)
-
 cpu=
 case "$target_cpu" in
     i?86|x86_64|amd64)	cpu=x86		;;