diff --git a/src/libsodium/crypto_core/ed25519/ref10/fe_25_5/constants.h b/src/libsodium/crypto_core/ed25519/ref10/fe_25_5/constants.h
index f9991755..3dc9156a 100644
--- a/src/libsodium/crypto_core/ed25519/ref10/fe_25_5/constants.h
+++ b/src/libsodium/crypto_core/ed25519/ref10/fe_25_5/constants.h
@@ -1,15 +1,20 @@
 /* 37095705934669439343138083508754565189542113879843219016388785533085940283555 */
 static const fe25519 d = {
-    -10913610, 13857413, -15372611, 6949391,   114729, -8787816,  -6275908, -3247719,  -18696448, -12055116
+    -10913610, 13857413, -15372611, 6949391,   114729, -8787816, -6275908, -3247719, -18696448, -12055116
 };
 
 /* 2 * d =
  * 16295367250680780974490674513165176452449235426866156013048779062215315747161
  */
 static const fe25519 d2 = {
-    -21827239, -5839606,  -30745221, 13898782, 229458, 15978800,  -12551817, -6495438,  29715968, 9444199 };
+    -21827239, -5839606,  -30745221, 13898782, 229458, 15978800, -12551817, -6495438, 29715968, 9444199 };
 
 /* sqrt(-1) */
 static const fe25519 sqrtm1 = {
-    -32595792, -7943725,  9377950,  3500415, 12389472, -272473,   -25146209, -2005654, 326686,  11406482
+    -32595792, -7943725,  9377950,  3500415, 12389472, -272473, -25146209, -2005654, 326686, 11406482
+};
+
+/* A = 486662 */
+static const fe25519 curve25519_A = {
+    486662, 0, 0, 0, 0, 0, 0, 0, 0, 0
 };