diff --git a/nvtsrv/nvtsrv.c b/nvtsrv/nvtsrv.c
index 3f29d93..31a9862 100644
--- a/nvtsrv/nvtsrv.c
+++ b/nvtsrv/nvtsrv.c
@@ -74,7 +74,7 @@ static void _tn_tx(void *cctx, const void *buf, int len)
 
 static void _tn_ss(void *cctx, int signal, int value)
 {
-    nvt_log(LOG_INFO, "RFC2217 signal %d: %02x", signal, value);
+    DBG("RFC2217 signal %d: %02x", signal, value);
 }
 
 static void _nvtsrv_init(void)
diff --git a/nvtsrv/telnet_server_rfc2217.c b/nvtsrv/telnet_server_rfc2217.c
index c610012..00a8769 100644
--- a/nvtsrv/telnet_server_rfc2217.c
+++ b/nvtsrv/telnet_server_rfc2217.c
@@ -138,8 +138,7 @@ void telnet_rfc2217_handle_opt(tn_ctx_t *tcc, int opt,
         case 9:                /* Set DTR Signal State OFF */
             valo = vali;
             tcc->dtr_state = (valo == 8) ? 1 : 0;
-            nvt_log(LOG_INFO, "RFC2217: Set DTR %s",
-                    tcc->dtr_state ? "on" : "off");
+            DBG("RFC2217: Set DTR %s", tcc->dtr_state ? "on" : "off");
             goto do_ctl_reply;
 
         case 10:               /* Request RTS Signal State */
@@ -149,8 +148,7 @@ void telnet_rfc2217_handle_opt(tn_ctx_t *tcc, int opt,
         case 12:               /* Set RTS Signal State OFF */
             valo = vali;
             tcc->rts_state = (valo == 11) ? 1 : 0;
-            nvt_log(LOG_INFO, "RFC2217: Set RTS %s",
-                    tcc->rts_state ? "on" : "off");
+            DBG("RFC2217: Set RTS %s", tcc->rts_state ? "on" : "off");
             goto do_ctl_reply;
 
         case 13:               /* Request Com Port Flow Control Setting (inbound) */