diff --git a/configure.ac b/configure.ac
index e7249b9..50b43ae 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,4 +1,4 @@
-# $Id: configure.ac,v 1.176 2003/12/08 20:35:59 tim Exp $
+# $Id: configure.ac,v 1.177 2003/12/17 07:53:26 dtucker Exp $
 
 AC_INIT
 AC_CONFIG_SRCDIR([ssh.c])
@@ -780,6 +780,30 @@
 	[#include <termios.h>]
 )
 
+dnl Some platorms have setresuid that isn't implemented
+AC_MSG_CHECKING(if setresuid seems to work)
+AC_TRY_RUN([
+#include <stdlib.h>
+#include <errno.h>
+int main(){errno=0; setresuid(0,0,0); if (errno==ENOSYS) exit(1); else exit(0);}
+	],
+	[AC_MSG_RESULT(yes)],
+	[AC_DEFINE(BROKEN_SETRESUID),
+	 AC_MSG_RESULT(not implemented)]
+)
+
+dnl Some platorms have setresgid that isn't implemented
+AC_MSG_CHECKING(if setresgid seems to work)
+AC_TRY_RUN([
+#include <stdlib.h>
+#include <errno.h>
+int main(){errno=0; setresgid(0,0,0); if (errno==ENOSYS) exit(1); else exit(0);}
+	],
+	[AC_MSG_RESULT(yes)],
+	[AC_DEFINE(BROKEN_SETRESGID)
+	 AC_MSG_RESULT(not implemented)]
+)
+
 dnl    Checks for time functions
 AC_CHECK_FUNCS(gettimeofday time)
 dnl    Checks for utmp functions