diff --git a/src/protocols/LoRaWAN/LoRaWAN.cpp b/src/protocols/LoRaWAN/LoRaWAN.cpp
index 7a5bcf4b..d1fdd427 100644
--- a/src/protocols/LoRaWAN/LoRaWAN.cpp
+++ b/src/protocols/LoRaWAN/LoRaWAN.cpp
@@ -1146,8 +1146,8 @@ int16_t LoRaWANNode::downlinkCommon() {
   RADIOLIB_ASSERT(state);
 
   // create the masks that are required for receiving downlinks
-  uint16_t irqFlags = 0x0000;
-  uint16_t irqMask = 0x0000;
+  uint32_t irqFlags = 0;
+  uint32_t irqMask = 0;
   this->phyLayer->irqRxDoneRxTimeout(irqFlags, irqMask);
 
   this->phyLayer->setPacketReceivedAction(LoRaWANNodeOnDownlinkAction);
diff --git a/src/protocols/PhysicalLayer/PhysicalLayer.cpp b/src/protocols/PhysicalLayer/PhysicalLayer.cpp
index 293402ae..f351cb47 100644
--- a/src/protocols/PhysicalLayer/PhysicalLayer.cpp
+++ b/src/protocols/PhysicalLayer/PhysicalLayer.cpp
@@ -132,7 +132,7 @@ int16_t PhysicalLayer::startReceive() {
   return(RADIOLIB_ERR_UNSUPPORTED);
 }
 
-int16_t PhysicalLayer::startReceive(uint32_t timeout, uint16_t irqFlags, uint16_t irqMask, size_t len) {
+int16_t PhysicalLayer::startReceive(uint32_t timeout, uint32_t irqFlags, uint32_t irqMask, size_t len) {
   (void)timeout;
   (void)irqFlags;
   (void)irqMask;
@@ -310,7 +310,7 @@ RadioLibTime_t PhysicalLayer::calculateRxTimeout(RadioLibTime_t timeoutUs) {
   return(0); 
 }
 
-int16_t PhysicalLayer::irqRxDoneRxTimeout(uint16_t &irqFlags, uint16_t &irqMask) {
+int16_t PhysicalLayer::irqRxDoneRxTimeout(uint32_t &irqFlags, uint32_t &irqMask) {
   (void)irqFlags;
   (void)irqMask;
   return(RADIOLIB_ERR_UNSUPPORTED);
diff --git a/src/protocols/PhysicalLayer/PhysicalLayer.h b/src/protocols/PhysicalLayer/PhysicalLayer.h
index 3d48eda2..9b3dc24c 100644
--- a/src/protocols/PhysicalLayer/PhysicalLayer.h
+++ b/src/protocols/PhysicalLayer/PhysicalLayer.h
@@ -144,7 +144,7 @@ class PhysicalLayer {
       \param len Packet length, needed for some modules under special circumstances (e.g. LoRa implicit header mode).
       \returns \ref status_codes
     */
-    virtual int16_t startReceive(uint32_t timeout, uint16_t irqFlags, uint16_t irqMask, size_t len);
+    virtual int16_t startReceive(uint32_t timeout, uint32_t irqFlags, uint32_t irqMask, size_t len);
 
     /*!
       \brief Binary receive method. Must be implemented in module class.
@@ -358,7 +358,7 @@ class PhysicalLayer {
       \param irqMask Mask indicating which IRQ triggers a DIO
       \returns \ref status_codes
     */
-    virtual int16_t irqRxDoneRxTimeout(uint16_t &irqFlags, uint16_t &irqMask);
+    virtual int16_t irqRxDoneRxTimeout(uint32_t &irqFlags, uint32_t &irqMask);
 
     /*!
       \brief Check whether the IRQ bit for RxTimeout is set