--- mod_accesslog.c	2009-12-11 11:24:07.000000000 +0800
+++ mod_accesslog.c.new	2009-12-30 18:06:17.000000000 +0800
@@ -867,7 +867,7 @@
 	buffer_append_string_len(b, CONST_STR_LEN("\n"));
 
 	if (p->conf.use_syslog ||  /* syslog doesn't cache */
-	    (p->conf.access_logfile->used && p->conf.access_logfile->ptr[0] != '|') || /* pipes don't cache */
+	    (p->conf.access_logfile->used && p->conf.access_logfile->ptr[0] == '|') || /* pipes don't cache */
 	    newts ||
 	    b->used > BUFFER_MAX_REUSE_SIZE) {
 		if (p->conf.use_syslog) {