diff --git a/pkg/semtech-loramac/contrib/semtech_loramac_radio.c b/pkg/semtech-loramac/contrib/semtech_loramac_radio.c
index 3303daa492..ea05dcb2ac 100644
--- a/pkg/semtech-loramac/contrib/semtech_loramac_radio.c
+++ b/pkg/semtech-loramac/contrib/semtech_loramac_radio.c
@@ -127,10 +127,7 @@ void SX127XSetRxConfig(RadioModems_t modem, uint32_t bandwidth,
     loramac_netdev_ptr->driver->set(loramac_netdev_ptr, NETOPT_CHANNEL_HOP_PERIOD, &hopPeriod, sizeof(uint8_t));
     netopt_enable_t iq_inverted = (iqInverted) ? NETOPT_ENABLE : NETOPT_DISABLE;
     loramac_netdev_ptr->driver->set(loramac_netdev_ptr, NETOPT_IQ_INVERT, &iq_inverted, sizeof(netopt_enable_t));
-    assert(symbTimeout <= UINT8_MAX);
-    uint8_t symbol_timeout = symbTimeout;
-    loramac_netdev_ptr->driver->set(loramac_netdev_ptr, NETOPT_RX_SYMBOL_TIMEOUT,
-                                    &symbol_timeout, sizeof(symbol_timeout));
+    loramac_netdev_ptr->driver->set(loramac_netdev_ptr, NETOPT_RX_SYMBOL_TIMEOUT, &symbTimeout, sizeof(uint16_t));
     netopt_enable_t single_rx = rxContinuous ? NETOPT_DISABLE : NETOPT_ENABLE;
     loramac_netdev_ptr->driver->set(loramac_netdev_ptr, NETOPT_SINGLE_RECEIVE, &single_rx, sizeof(netopt_enable_t));
 }