diff --git a/kalyna.cpp b/kalyna.cpp
index f4c3cc0e..01ad218a 100644
--- a/kalyna.cpp
+++ b/kalyna.cpp
@@ -31,6 +31,9 @@ NAMESPACE_END
 
 ANONYMOUS_NAMESPACE_BEGIN
 
+// The typedef here is to sidestep problems with byte in the global namespace
+typedef unsigned char byte;
+
 using CryptoPP::word64;
 using CryptoPP::KalynaTab::T;
 using CryptoPP::KalynaTab::S;