diff --git a/toxcore/network.h b/toxcore/network.h
index 99fc4039..c1418c4c 100644
--- a/toxcore/network.h
+++ b/toxcore/network.h
@@ -71,6 +71,9 @@ typedef int sock_t;
 #include <crypto_secretbox.h>
 #include <randombytes.h>
 #define crypto_box_MACBYTES (crypto_box_ZEROBYTES - crypto_box_BOXZEROBYTES)
+#endif
+
+#ifndef crypto_secretbox_MACBYTES
 #define crypto_secretbox_MACBYTES (crypto_secretbox_ZEROBYTES - crypto_secretbox_BOXZEROBYTES)
 #endif