1 files changed, 2 insertions, 2 deletions
diff --git a/src/block/cast/cast128.h b/src/block/cast/cast128.h
index bb8332aca..18c0c1868 100644
--- a/src/block/cast/cast128.h
+++ b/src/block/cast/cast128.h
@@ -18,8 +18,8 @@ namespace Botan {
 class BOTAN_DLL CAST_128 : 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(MK); zeroise(RK); }
       std::string name() const { return "CAST-128"; }