diff --git a/src/libsodium/include/sodium/crypto_sign_ed25519.h b/src/libsodium/include/sodium/crypto_sign_ed25519.h
index f21335e2..ce03d1d9 100644
--- a/src/libsodium/include/sodium/crypto_sign_ed25519.h
+++ b/src/libsodium/include/sodium/crypto_sign_ed25519.h
@@ -4,7 +4,7 @@
 #include <stddef.h>
 #include "export.h"
 
-#define crypto_sign_ed25519_SECRETKEYBYTES 64U
+#define crypto_sign_ed25519_SECRETKEYBYTES (32U + 32U)
 #define crypto_sign_ed25519_PUBLICKEYBYTES 32U
 #define crypto_sign_ed25519_SEEDBYTES 32U
 #define crypto_sign_ed25519_BYTES 64U
diff --git a/src/libsodium/include/sodium/crypto_sign_edwards25519sha512batch.h b/src/libsodium/include/sodium/crypto_sign_edwards25519sha512batch.h
index 825b42d0..7577ebf7 100644
--- a/src/libsodium/include/sodium/crypto_sign_edwards25519sha512batch.h
+++ b/src/libsodium/include/sodium/crypto_sign_edwards25519sha512batch.h
@@ -4,7 +4,7 @@
 #include <stddef.h>
 #include "export.h"
 
-#define crypto_sign_edwards25519sha512batch_SECRETKEYBYTES 64U
+#define crypto_sign_edwards25519sha512batch_SECRETKEYBYTES (32U + 32U)
 #define crypto_sign_edwards25519sha512batch_PUBLICKEYBYTES 32U
 #define crypto_sign_edwards25519sha512batch_BYTES 64U