diff --git a/src/libsodium/crypto_sign/ed25519/ref10/ed25519_ref10.h b/src/libsodium/crypto_sign/ed25519/ref10/ed25519_ref10.h
new file mode 100644
index 00000000..8d93892b
--- /dev/null
+++ b/src/libsodium/crypto_sign/ed25519/ref10/ed25519_ref10.h
@@ -0,0 +1,18 @@
+#ifndef ed25519_ref10_H
+#define ed25519_ref10_H
+
+void _crypto_sign_ed25519_ref10_hinit(crypto_hash_sha512_state *hs,
+                                      int prehashed);
+
+int _crypto_sign_ed25519_detached(unsigned char *sig,
+                                  unsigned long long *siglen_p,
+                                  const unsigned char *m,
+                                  unsigned long long mlen,
+                                  const unsigned char *sk, int prehashed);
+
+int _crypto_sign_ed25519_verify_detached(const unsigned char *sig,
+                                         const unsigned char *m,
+                                         unsigned long long   mlen,
+                                         const unsigned char *pk,
+                                         int prehashed);
+#endif