diff --git a/configure.ac b/configure.ac
index 88c4633d5..4d9382ca7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -4151,7 +4151,7 @@ AC_ARG_WITH([kerberos5],
 		AC_DEFINE([KRB5], [1], [Define if you want Kerberos 5 support])
 		KRB5_MSG="yes"
 
-		AC_PATH_PROG([KRB5CONF], [krb5-config],
+		AC_PATH_TOOL([KRB5CONF], [krb5-config],
 			     [$KRB5ROOT/bin/krb5-config],
 			     [$KRB5ROOT/bin:$PATH])
 		if test -x $KRB5CONF ; then