diff --git a/src/modules/Si443x/Si443x.cpp b/src/modules/Si443x/Si443x.cpp
index c6a225af..78120992 100644
--- a/src/modules/Si443x/Si443x.cpp
+++ b/src/modules/Si443x/Si443x.cpp
@@ -300,7 +300,7 @@ int16_t Si443x::startReceive() {
   return(state);
 }
 
-int16_t Si443x::startReceive(uint32_t timeout, uint16_t irqFlags, uint16_t irqMask, size_t len) {
+int16_t Si443x::startReceive(uint32_t timeout, uint32_t irqFlags, uint32_t irqMask, size_t len) {
   (void)timeout;
   (void)irqFlags;
   (void)irqMask;
diff --git a/src/modules/Si443x/Si443x.h b/src/modules/Si443x/Si443x.h
index 9d639806..b8986b65 100644
--- a/src/modules/Si443x/Si443x.h
+++ b/src/modules/Si443x/Si443x.h
@@ -705,7 +705,7 @@ class Si443x: public PhysicalLayer {
       \param len Ignored.
       \returns \ref status_codes
     */
-    int16_t startReceive(uint32_t timeout, uint16_t irqFlags, uint16_t irqMask, size_t len);
+    int16_t startReceive(uint32_t timeout, uint32_t irqFlags, uint32_t irqMask, size_t len);
 
     /*!
       \brief Reads data that was received after calling startReceive method. When the packet length is not known in advance,