--- snort-orig-2.9.2.3/src/output-plugins/spo_alert_unixsock.c	2012-03-17 17:40:01.000000000 -0400
+++ snort-2.9.2.3/src/output-plugins/spo_alert_unixsock.c	2012-08-18 07:16:57.000000000 -0400
@@ -270,6 +270,7 @@
 static void OpenAlertSock(void)
 {
     char srv[STD_BUF];
+    int buflen=sizeof(Alertpkt);
 
     /* srv is our filename workspace. Set it to file UNSOCK_FILE inside the log directory. */
     SnortSnprintf(srv, STD_BUF, "%s%s/%s",
@@ -293,6 +294,11 @@
     {
         FatalError("socket() call failed: %s", strerror(errno));
     }
+
+    if(setsockopt(alertsd, SOL_SOCKET, SO_SNDBUF, (char*)&buflen, sizeof(int)) < 0)
+    {
+        FatalError("setsockopt() call failed: %s", strerror(errno));
+    }
 }
 
 static void AlertUnixSockCleanExit(int signal, void *arg)