diff --git a/gf256.h b/gf256.h
index b3ea71ee..e50cf6d9 100644
--- a/gf256.h
+++ b/gf256.h
@@ -2,6 +2,7 @@
 #define CRYPTOPP_GF256_H
 
 #include "cryptlib.h"
+#include "misc.h"
 
 NAMESPACE_BEGIN(CryptoPP)