diff --git a/configure.in b/configure.in
index ac74f10..1f7ae2b 100644
--- a/configure.in
+++ b/configure.in
@@ -142,7 +142,7 @@ dnl avoid -lnsl checks, if we already have the functions which are
 dnl usually in libnsl
 
 unset ac_cv_func_yp_get_default_domain
-AC_CHECK_FUNC(yp_get_default_domain, [ tinyproxy_no_nsl_checks=yes ], [ ])
+AC_CHECK_FUNC(yp_get_default_domain, [ tinyproxy_no_nsl_checks=yes ])
 unset ac_cv_func_yp_get_default_domain
 
 if test "$tinyproxy_no_nsl_checks" != "yes"; then