diff --git a/xxh3.h b/xxh3.h
index 7c564f9..7fdf9d5 100644
--- a/xxh3.h
+++ b/xxh3.h
@@ -2529,7 +2529,7 @@ XXH_PUBLIC_API XXH128_hash_t
 XXH3_128bits_withSecret(const void* input, size_t len, const void* secret, size_t secretSize)
 {
     return XXH3_128bits_internal(input, len, 0,
-                                 secret, secretSize,
+                                 (const xxh_u8*)secret, secretSize,
                                  XXH3_hashLong_128b_defaultSecret);
 }