--- spawn-fcgi.orig	2009-03-02 02:34:24.570010541 +0100
+++ spawn-fcgi	2009-03-02 02:37:34.245370786 +0100
@@ -25,6 +25,13 @@
 		return 1
 	fi
 
+	if [[ ! -z "${FCGI_ADDRESS}" ]] && [[ ! -z "${FCGI_PORT}" ]]; then
+		eerror "Only one of both must be defined:"
+		eerror "  FCGI_ADDRESS=${FCGI_ADDRESS}"
+		eerror "  FCGI_PORT=${FCGI_PORT}"
+		return 1
+	fi
+
 	local X E OPTIONS SOCKET_OPTION PORT_OPTION RETVAL
 	
 	if [[ -z "${FCGI_ADDRESS}" ]]; then