diff --git a/src/libsodium/crypto_onetimeauth/poly1305/onetimeauth_poly1305.h b/src/libsodium/crypto_onetimeauth/poly1305/onetimeauth_poly1305.h
new file mode 100644
index 00000000..703485a6
--- /dev/null
+++ b/src/libsodium/crypto_onetimeauth/poly1305/onetimeauth_poly1305.h
@@ -0,0 +1,23 @@
+
+#ifndef onetimeauth_poly1305_H
+#define onetimeauth_poly1305_H
+
+typedef struct crypto_onetimeauth_poly1305_implementation {
+    int         (*onetimeauth)(unsigned char *out,
+                               const unsigned char *in,
+                               unsigned long long inlen,
+                               const unsigned char *k);
+    int         (*onetimeauth_verify)(const unsigned char *h,
+                                      const unsigned char *in,
+                                      unsigned long long inlen,
+                                      const unsigned char *k);
+    int         (*onetimeauth_init)(crypto_onetimeauth_poly1305_state *state,
+                                    const unsigned char *key);
+    int         (*onetimeauth_update)(crypto_onetimeauth_poly1305_state *state,
+                                      const unsigned char *in,
+                                      unsigned long long inlen);
+    int         (*onetimeauth_final)(crypto_onetimeauth_poly1305_state *state,
+                                     unsigned char *out);
+} crypto_onetimeauth_poly1305_implementation;
+
+#endif