diff --git a/src/protocol.c b/src/protocol.c
--- a/src/protocol.c
+++ b/src/protocol.c
@@ -25,7 +25,7 @@ bool protocol_receive_message(CanRxMsgTy
     protocol_message_t message;
     message.command = can_message->Data[0] & 0x80;
     message.id = can_message->Data[0] & 0x7F;
-    message.key = (can_message->Data[1] << 8) & can_message->Data[2];
+    message.key = (can_message->Data[1] << 8) | can_message->Data[2];
     message.sensor = can_message->Data[3];
     message.data.byte_data[0] = can_message->Data[4];
     message.data.byte_data[1] = can_message->Data[5];