diff --git a/configure.ac b/configure.ac
index c8920d877e3..6e2cda947ae 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2025,6 +2025,7 @@ if test "${HAVE_NS}" = yes; then
      infodir="\${ns_appresdir}/info"
      mandir="\${ns_appresdir}/man"
      lispdir="\${ns_appresdir}/lisp"
+     lispdirrel="\${ns_appresdir}/lisp"
      test "$locallisppathset" = no && locallisppath="\${ns_appresdir}/site-lisp"
      INSTALL_ARCH_INDEP_EXTRA=
   fi