diff --git a/serviceinterface/ServiceInterfacePrinter.h b/serviceinterface/ServiceInterfacePrinter.h
index fbdccdd1..e898adf6 100644
--- a/serviceinterface/ServiceInterfacePrinter.h
+++ b/serviceinterface/ServiceInterfacePrinter.h
@@ -2,6 +2,20 @@
 #include <cstdio>
 #endif
 
+//! https://stackoverflow.com/questions/111928/is-there-a-printf-converter-to-print-in-binary-format
+//! Can be used to print out binary numbers in human-readable format.
+#define BYTE_TO_BINARY_PATTERN "%c%c%c%c%c%c%c%c"
+#define BYTE_TO_BINARY(byte)  \
+  (byte & 0x80 ? '1' : '0'), \
+  (byte & 0x40 ? '1' : '0'), \
+  (byte & 0x20 ? '1' : '0'), \
+  (byte & 0x10 ? '1' : '0'), \
+  (byte & 0x08 ? '1' : '0'), \
+  (byte & 0x04 ? '1' : '0'), \
+  (byte & 0x02 ? '1' : '0'), \
+  (byte & 0x01 ? '1' : '0')
+
+
 namespace sif {
 
 enum PrintLevel {