diff --git a/src/protocols/PhysicalLayer/PhysicalLayer.h b/src/protocols/PhysicalLayer/PhysicalLayer.h
index f27e79ea..f1b2eb0d 100644
--- a/src/protocols/PhysicalLayer/PhysicalLayer.h
+++ b/src/protocols/PhysicalLayer/PhysicalLayer.h
@@ -521,6 +521,7 @@ class PhysicalLayer {
     size_t maxPacketLength;
 
     #if !RADIOLIB_EXCLUDE_DIRECT_RECEIVE
+    uint8_t byteBuff;
     uint8_t bufferBitPos;
     uint8_t bufferWritePos;
     uint8_t bufferReadPos;