diff --git a/appl/su/su.c b/appl/su/su.c
index f3dcb5e6a..8546de827 100644
--- a/appl/su/su.c
+++ b/appl/su/su.c
@@ -40,7 +40,9 @@ RCSID("$Id$");
 
 #include <syslog.h>
 
+#ifdef HAVE_PATHS_H
 #include <paths.h>
+#endif
 
 #include <pwd.h>
 
@@ -53,6 +55,10 @@ RCSID("$Id$");
 #define _PATH_DEFPATH "/usr/bin:/bin"
 #endif
 
+#ifndef _PATH_BSHELL
+#define _PATH_BSHELL "/bin/sh"
+#endif
+
 int kerberos_flag = 1;
 int csh_f_flag;
 int full_login;