diff --git a/channels.c b/channels.c
index efb04d6..e8b8aa0 100644
--- a/channels.c
+++ b/channels.c
@@ -1653,6 +1653,7 @@
 			}
 			return -1;
 		}
+#ifndef BROKEN_TCGETATTR_ICANON
 		if (compat20 && c->isatty && dlen >= 1 && buf[0] != '\r') {
 			if (tcgetattr(c->wfd, &tio) == 0 &&
 			    !(tio.c_lflag & ECHO) && (tio.c_lflag & ICANON)) {
@@ -1666,6 +1667,7 @@
 				packet_send();
 			}
 		}
+#endif
 		buffer_consume(&c->output, len);
 		if (compat20 && len > 0) {
 			c->local_consumed += len;