diff --git a/src/crypto/slow-hash.c b/src/crypto/slow-hash.c
index c733d7b39..8c7dad8e0 100644
--- a/src/crypto/slow-hash.c
+++ b/src/crypto/slow-hash.c
@@ -727,7 +727,7 @@ void slow_hash_free_state(void)
 
 #define U64(x) ((uint64_t *) (x))
 
-STATIC INLINE void xor64(uint64 *a, const uint64 b)
+STATIC INLINE void xor64(uint64_t *a, const uint64_t b)
 {
     *a ^= b;
 }