diff --git a/sshd.c b/sshd.c
index 78729dd..eb49b5b 100644
--- a/sshd.c
+++ b/sshd.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: sshd.c,v 1.448 2015/04/27 00:21:21 djm Exp $ */
+/* $OpenBSD: sshd.c,v 1.449 2015/05/21 06:43:31 djm Exp $ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -1698,6 +1698,11 @@
 	    strcasecmp(options.authorized_keys_command, "none") != 0))
 		fatal("AuthorizedKeysCommand set without "
 		    "AuthorizedKeysCommandUser");
+	if (options.authorized_principals_command_user == NULL &&
+	    (options.authorized_principals_command != NULL &&
+	    strcasecmp(options.authorized_principals_command, "none") != 0))
+		fatal("AuthorizedPrincipalsCommand set without "
+		    "AuthorizedPrincipalsCommandUser");
 
 	/*
 	 * Check whether there is any path through configured auth methods.