diff --git a/src_main/io/piserial.cpp b/src_main/io/piserial.cpp
index 9963b144..0ba622a6 100755
--- a/src_main/io/piserial.cpp
+++ b/src_main/io/piserial.cpp
@@ -566,7 +566,7 @@ void PISerial::applySettings() {
 	tcgetattr(fd, &PRIVATE->desc);
 	PRIVATE->desc.c_oflag = PRIVATE->desc.c_lflag = PRIVATE->desc.c_cflag = 0;
 	PRIVATE->desc.c_iflag = IGNBRK;
-	PRIVATE->desc.c_cflag = CLOCAL | HUPCL;
+	PRIVATE->desc.c_cflag = CLOCAL;// | HUPCL;
 	switch (dataBitsCount()) {
 	case 5: PRIVATE->desc.c_cflag |= (CSIZE & CS5); break;
 	case 6: PRIVATE->desc.c_cflag |= (CSIZE & CS6); break;