diff --git a/configure.ac b/configure.ac
index 42fd890b9..c285ea32b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -48,6 +48,8 @@ AC_PATH_PROG([SED], [sed])
 AC_PATH_PROG([TEST_MINUS_S_SH], [bash])
 AC_PATH_PROG([TEST_MINUS_S_SH], [ksh])
 AC_PATH_PROG([TEST_MINUS_S_SH], [sh])
+AC_PATH_PROG([SH], [bash])
+AC_PATH_PROG([SH], [ksh])
 AC_PATH_PROG([SH], [sh])
 AC_PATH_PROG([GROFF], [groff])
 AC_PATH_PROG([NROFF], [nroff awf])