1 files changed, 2 insertions, 2 deletions
diff --git a/src/block/serpent_simd/serp_simd.h b/src/block/serpent_simd/serp_simd.h
index 75a8434d1..b3c0b06c8 100644
--- a/src/block/serpent_simd/serp_simd.h
+++ b/src/block/serpent_simd/serp_simd.h
@@ -20,8 +20,8 @@ class BOTAN_DLL Serpent_SIMD : public Serpent
    public:
       size_t parallelism() const { return 4; }
 
-      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;
 
       BlockCipher* clone() const { return new Serpent_SIMD; }
    };