diff --git a/libs/console/full/src/cons_tty.c b/libs/console/full/src/cons_tty.c
index 7dfd0b7..fb2015c 100644
--- a/libs/console/full/src/cons_tty.c
+++ b/libs/console/full/src/cons_tty.c
@@ -165,6 +165,9 @@
     struct console_tty *ct = &console_tty;
     int i;
 
+    if (!ct->ct_write_char) {
+        return cnt;
+    }
     for (i = 0; i < cnt; i++) {
         if (str[i] == '\n') {
             ct->ct_write_char('\r');