diff --git a/src/crypto/slow-hash.c b/src/crypto/slow-hash.c
index 35d5bf69..351314bf 100644
--- a/src/crypto/slow-hash.c
+++ b/src/crypto/slow-hash.c
@@ -40,9 +40,6 @@
 #define U64(x) ((uint64_t *) (x))
 #define R128(x) ((__m128i *) (x))
 
-extern int aesb_single_round(const uint8_t *in, uint8_t*out, const uint8_t *expandedKey);
-extern int aesb_pseudo_round(const uint8_t *in, uint8_t *out, const uint8_t *expandedKey);
-
 #pragma pack(push, 1)
 union cn_slow_hash_state
 {