diff --git a/src/raspi/spi.cpp b/src/raspi/spi.cpp
index 135adb1..fa214e2 100644
--- a/src/raspi/spi.cpp
+++ b/src/raspi/spi.cpp
@@ -10,6 +10,11 @@
 #include <cstdlib>
 #include <string.h>
 
+
+#define SYSTEM_ENDIANNESS __cpp_lib_endian
+
+// TODO: Check out "cpu_to_leXX()" and "leXX()_to_cpu()" on Linux!
+
 namespace sta
 {