diff --git a/include/telnet.h b/include/telnet.h
index 16a3096baf..9e6b968dbf 100644
--- a/include/telnet.h
+++ b/include/telnet.h
@@ -31,7 +31,10 @@
 #define CMD_WONT	252
 #define CMD_DO		253
 #define CMD_DONT	254
+#define CMD_SB		250
+#define CMD_SE		240
 #define OPT_SGA		3
+#define OPT_NAWS	31
 
 int	telnet_test_login(ZBX_SOCKET socket_fd);
 int	telnet_login(ZBX_SOCKET socket_fd, const char *username, const char *password, AGENT_RESULT *result);
diff --git a/src/libs/zbxcomms/telnet.c b/src/libs/zbxcomms/telnet.c
index 76d8f9f98a..5e7bcc1412 100644
--- a/src/libs/zbxcomms/telnet.c
+++ b/src/libs/zbxcomms/telnet.c
@@ -171,6 +171,20 @@ static ssize_t	telnet_read(ZBX_SOCKET socket_fd, char *buf, size_t *buf_left, si
 
 						zabbix_log(LOG_LEVEL_DEBUG, "%s() c3:%x", __func__, c3);
 
+						/* Order 'Do Negotiate About Window Size' */
+						if (CMD_DO == c2 && OPT_NAWS == c3)
+						{
+							unsigned char will_naws[] = {CMD_IAC, CMD_WILL, OPT_NAWS};
+							unsigned char large_ws[] = {CMD_IAC, CMD_SB, OPT_NAWS,
+								0x05, 0x00, 0x00, 0x78, /* width = 1280, height = 120 */
+								CMD_IAC, CMD_SE};
+							telnet_socket_write(socket_fd, will_naws,
+								sizeof(will_naws)/sizeof(unsigned char));
+							telnet_socket_write(socket_fd, large_ws,
+								sizeof(large_ws)/sizeof(unsigned char));
+							break;
+						}
+
 						/* reply to all options with "WONT" or "DONT", */
 						/* unless it is Suppress Go Ahead (SGA)        */