diff --git a/src/libsodium/crypto_scalarmult/curve25519/ref10/x25519_ref10.h b/src/libsodium/crypto_scalarmult/curve25519/ref10/x25519_ref10.h
index 39c2a20a..98cf1924 100644
--- a/src/libsodium/crypto_scalarmult/curve25519/ref10/x25519_ref10.h
+++ b/src/libsodium/crypto_scalarmult/curve25519/ref10/x25519_ref10.h
@@ -1,5 +1,5 @@
-#ifndef curve25519_ref10_H
-#define curve25519_ref10_H
+#ifndef x25519_ref10_H
+#define x25519_ref10_H
 
 #include "crypto_scalarmult_curve25519.h"
 #include "../scalarmult_curve25519.h"