1 files changed, 2 insertions, 2 deletions
diff --git a/src/block/serpent/serpent.h b/src/block/serpent/serpent.h
index f980c602e..a436c578a 100644
--- a/src/block/serpent/serpent.h
+++ b/src/block/serpent/serpent.h
@@ -18,8 +18,8 @@ namespace Botan {
 class BOTAN_DLL Serpent : public BlockCipher
    {
    public:
-      void encrypt_n(const byte in[], byte out[], u32bit blocks) const;
-      void decrypt_n(const byte in[], byte out[], u32bit blocks) const;
+      void encrypt_n(const byte in[], byte out[], size_t blocks) const;
+      void decrypt_n(const byte in[], byte out[], size_t blocks) const;
 
       void clear() { zeroise(round_key); }
       std::string name() const { return "Serpent"; }