diff --git a/crypto.cpp b/crypto.cpp
index 3c74a44..e1f3653 100644
--- a/crypto.cpp
+++ b/crypto.cpp
@@ -27,7 +27,7 @@
 #include <iostream>
 #include <cstring>
 #include <cstdlib>
-#include <endian.h>
+#include <arpa/inet.h>
 
 void load_keys (const char* filepath, keys_t* keys)
 {
@@ -71,7 +71,7 @@ void aes_ctr_state::process (const AES_KEY* key, const uint8_t* in, uint8_t* out
 			//  first 12 bytes - nonce
 			//  last   4 bytes - block number (sequentially increasing with each block)
 			uint8_t		ctr[16];
-			uint32_t	blockno = htole32(byte_counter / 16);
+			uint32_t	blockno = htonl(byte_counter / 16);
 			memcpy(ctr, nonce, 12);
 			memcpy(ctr + 12, &blockno, 4);
 			AES_encrypt(ctr, otp, key);