diff --git a/modbussrv.cc b/modbussrv.cc
index 20d62a5..b2e5542 100644
--- a/modbussrv.cc
+++ b/modbussrv.cc
@@ -259,10 +259,11 @@ void ModbusSrv::ServerThread() {
 						}
 						else {
 							char *txt = (char*)malloc(255);
-							snprintf (txt, 255, "error on processing message\n");
+							snprintf (txt, 255, "error on processing message, close connection\n");
 							gdk_threads_add_idle(cb_thread_network_text_add, txt);
 							delete clients[slot];
 							clients[slot] = NULL;
+
 						}
 					}
 					else if (mbindata->fc == 5 || mbindata->fc == 6) {
@@ -273,7 +274,7 @@ void ModbusSrv::ServerThread() {
 						}
 						else {
 							char *txt = (char*)malloc(255);
-							snprintf (txt, 255, "error on processing message\n");
+							snprintf (txt, 255, "error on processing message, close connection\n");
 							gdk_threads_add_idle(cb_thread_network_text_add, txt);
 							delete clients[slot];
 							clients[slot] = NULL;
@@ -285,7 +286,7 @@ void ModbusSrv::ServerThread() {
 						}
 						else {
 							char *txt = (char*)malloc(255);
-							snprintf (txt, 255, "error on processing message\n");
+							snprintf (txt, 255, "error on processing message, close connection\n");
 							gdk_threads_add_idle(cb_thread_network_text_add, txt);
 							delete clients[slot];
 							clients[slot] = NULL;