diff --git a/src/protocols/LoRaWAN/LoRaWAN.cpp b/src/protocols/LoRaWAN/LoRaWAN.cpp
index 1cacfda5..a5bb9465 100644
--- a/src/protocols/LoRaWAN/LoRaWAN.cpp
+++ b/src/protocols/LoRaWAN/LoRaWAN.cpp
@@ -231,7 +231,7 @@ int16_t LoRaWANNode::beginOTAA(uint64_t appEUI, uint64_t devEUI, uint8_t* nwkKey
   return(RADIOLIB_ERR_NONE);
 }
 
-int16_t LoRaWANNode::beginAPB(uint32_t addr, uint8_t* nwkSKey, uint8_t* appSKey, uint8_t* fNwkSIntKey, uint8_t* sNwkSIntkey) {
+int16_t LoRaWANNode::beginAPB(uint32_t addr, uint8_t* nwkSKey, uint8_t* appSKey, uint8_t* fNwkSIntKey, uint8_t* sNwkSIntKey) {
   this->devAddr = addr;
   memcpy(this->appSKey, appSKey, RADIOLIB_AES128_KEY_SIZE);
   memcpy(this->nwkSEncKey, nwkSKey, RADIOLIB_AES128_KEY_SIZE);
diff --git a/src/protocols/LoRaWAN/LoRaWAN.h b/src/protocols/LoRaWAN/LoRaWAN.h
index 36550e9a..d0262df1 100644
--- a/src/protocols/LoRaWAN/LoRaWAN.h
+++ b/src/protocols/LoRaWAN/LoRaWAN.h
@@ -255,10 +255,10 @@ class LoRaWANNode {
       \param nwkSKey Pointer to the network session AES-128 key (LoRaWAN 1.0) or MAC command network session key (LoRaWAN 1.1).
       \param appSKey Pointer to the application session AES-128 key.
       \param fNwkSIntKey Pointer to the network session F key (LoRaWAN 1.1), unused for LoRaWAN 1.0.
-      \param sNwkSIntkey Pointer to the network session S key (LoRaWAN 1.1), unused for LoRaWAN 1.0.
+      \param sNwkSIntKey Pointer to the network session S key (LoRaWAN 1.1), unused for LoRaWAN 1.0.
       \returns \ref status_codes
     */
-    int16_t beginAPB(uint32_t addr, uint8_t* nwkSKey, uint8_t* appSKey, uint8_t* fNwkSIntKey = NULL, uint8_t* sNwkSIntkey = NULL);
+    int16_t beginAPB(uint32_t addr, uint8_t* nwkSKey, uint8_t* appSKey, uint8_t* fNwkSIntKey = NULL, uint8_t* sNwkSIntKey = NULL);
 
     #if defined(RADIOLIB_BUILD_ARDUINO)
     /*!