diff --git a/src/protocols/PhysicalLayer/PhysicalLayer.h b/src/protocols/PhysicalLayer/PhysicalLayer.h
index cc67d938..00d39fb2 100644
--- a/src/protocols/PhysicalLayer/PhysicalLayer.h
+++ b/src/protocols/PhysicalLayer/PhysicalLayer.h
@@ -282,7 +282,7 @@ class PhysicalLayer {
 
       \param pin Pin on which to read.
     */
-    virtual void readBit(uint8_t pin) = 0;
+    virtual void readBit(RADIOLIB_PIN_TYPE pin) = 0;
 
     /*!
       \brief Get the number of direct mode bytes currently available in buffer.