diff --git a/src/hardware/teleinfo/api.c b/src/hardware/teleinfo/api.c
index 4060b03e..77cd5f8d 100644
--- a/src/hardware/teleinfo/api.c
+++ b/src/hardware/teleinfo/api.c
@@ -76,7 +76,7 @@ static GSList *scan(GSList *options)
 
 	if (!(serial = sr_serial_dev_inst_new(conn, serialcomm)))
 		return NULL;
-	if (serial_open(serial, SERIAL_RDONLY | SERIAL_NONBLOCK) != SR_OK)
+	if (serial_open(serial, SERIAL_RDONLY) != SR_OK)
 		return NULL;
 
 	sr_info("Probing serial port %s.", conn);
diff --git a/src/hardware/teleinfo/protocol.c b/src/hardware/teleinfo/protocol.c
index a610173d..d2b96e1f 100644
--- a/src/hardware/teleinfo/protocol.c
+++ b/src/hardware/teleinfo/protocol.c
@@ -196,7 +196,7 @@ SR_PRIV int teleinfo_receive_data(int fd, int revents, void *cb_data)
 
 	/* Try to get as much data as the buffer can hold. */
 	len = TELEINFO_BUF_SIZE - devc->buf_len;
-	len = serial_read(serial, devc->buf + devc->buf_len, len);
+	len = serial_read_nonblocking(serial, devc->buf + devc->buf_len, len);
 	if (len < 1) {
 		sr_err("Serial port read error: %d.", len);
 		return FALSE;