1diff --git a/configure.ac b/configure.ac
2index e4c6aaec..03883ad7 100644
3--- a/configure.ac
4+++ b/configure.ac
5@@ -682,7 +682,7 @@ if test "$enable_utmpx" = "yes"; then
6 [Define if utmpx should be used])
7 fi
8
9-AC_DEFINE_UNQUOTED(SHELL, ["$SHELL"], [The default shell.])
10+AC_DEFINE_UNQUOTED(SHELL, ["$RUNTIME_SHELL"], [The runtime shell.])
11
12 AM_GNU_GETTEXT_VERSION(0.16)
13 AM_GNU_GETTEXT([external], [need-ngettext])