diff --git a/features/lorawan/lorastack/mac/LoRaMac.h b/features/lorawan/lorastack/mac/LoRaMac.h
index dd4bb27cfa..49e24492d9 100644
--- a/features/lorawan/lorastack/mac/LoRaMac.h
+++ b/features/lorawan/lorastack/mac/LoRaMac.h
@@ -370,14 +370,14 @@ public:
      *
      * @return LORAWAN_STATUS_OK or a negative error code on failure.
      */
-    lorawan_status_t prepare_join(const lorawan_connect_t *params, bool is_otaa = true);
+    lorawan_status_t prepare_join(const lorawan_connect_t *params, bool is_otaa);
 
     /**
      * @brief join Joins the network.
      * @param is_otaa True if joining is to be done using OTAA, false for ABP.
      * @return LORAWAN_STATUS_OK or a negative error code on failure.
      */
-    lorawan_status_t join(bool is_otaa = true);
+    lorawan_status_t join(bool is_otaa);
 
 private:
     /**
diff --git a/features/lorawan/lorastack/phy/loraphy_target.h b/features/lorawan/lorastack/phy/loraphy_target.h
index a6815c3485..460a40ed20 100644
--- a/features/lorawan/lorastack/phy/loraphy_target.h
+++ b/features/lorawan/lorastack/phy/loraphy_target.h
@@ -60,8 +60,6 @@
  #elif MBED_CONF_LORA_PHY    == US915_HYBRID
   #include "lorawan/lorastack/phy/LoRaPHYUS915Hybrid.h"
   #define LoRaPHY_region LoRaPHYUS915Hybrid
- #else
-  #error "Unsupported region, check your configuration."
  #endif //MBED_CONF_LORA_PHY == VALUE
 #else
  #error "Must set LoRa PHY layer parameters."