diff -Naur openca-ocspd-1.7.0.orig/configure.in openca-ocspd-1.7.0.new/configure.in
--- openca-ocspd-1.7.0.orig/configure.in	2013-11-05 11:35:16.362736109 +0100
+++ openca-ocspd-1.7.0.new/configure.in	2013-11-05 12:13:46.949198675 +0100
@@ -45,6 +45,10 @@
 	[AC_MSG_ERROR([pthread library is needed!])]
 )
 
+AC_CHECK_FUNC(setgroups,
+	[AC_DEFINE([HAVE_SETGROUPS], 1, [setgroups() function])]
+)
+
 if test x$arch = xlinux ; then
   AC_DEFINE(OCSPD_TARGET_LINUX, 1, [Linux])
 fi
diff -Naur openca-ocspd-1.7.0.orig/src/support.c openca-ocspd-1.7.0.new/src/support.c
--- openca-ocspd-1.7.0.orig/src/support.c	2008-11-10 21:14:06.000000000 +0100
+++ openca-ocspd-1.7.0.new/src/support.c	2013-11-05 11:59:56.344162745 +0100
@@ -275,6 +275,10 @@
 		return 0;
 	}
 
+#ifdef HAVE_SETGROUPS
+	setgroups(1, &gr->gr_gid);
+#endif
+
 	if (setuid (pw->pw_uid) == -1) {
 		syslog(LOG_ERR,"Error setting user %d (%s)", 
 						pw->pw_uid, conf->user );