diff --git a/features/lorawan/lorastack/mac/LoRaMac.cpp b/features/lorawan/lorastack/mac/LoRaMac.cpp
index 47bf516d75..c9cb2f67a0 100644
--- a/features/lorawan/lorastack/mac/LoRaMac.cpp
+++ b/features/lorawan/lorastack/mac/LoRaMac.cpp
@@ -1862,7 +1862,6 @@ uint8_t LoRaMac::get_max_possible_tx_size(uint8_t fopts_len)
         max_possible_payload_size = allowed_frm_payload_size - fopts_len;
     } else {
         max_possible_payload_size = allowed_frm_payload_size;
-        fopts_len = 0;
         _mac_commands.clear_command_buffer();
         _mac_commands.clear_repeat_buffer();
     }
diff --git a/features/lorawan/lorastack/phy/LoRaPHY.cpp b/features/lorawan/lorastack/phy/LoRaPHY.cpp
index 322446896c..6016401a6f 100644
--- a/features/lorawan/lorastack/phy/LoRaPHY.cpp
+++ b/features/lorawan/lorastack/phy/LoRaPHY.cpp
@@ -36,7 +36,8 @@ SPDX-License-Identifier: BSD-3-Clause
 #define CHANNELS_IN_MASK  16
 
 LoRaPHY::LoRaPHY()
-    : _radio(NULL)
+    : _radio(NULL),
+      _lora_time(NULL)
 {
     memset(&phy_params, 0, sizeof(phy_params));
 }