diff --git a/src/libsodium/Makefile.am b/src/libsodium/Makefile.am
index 366f9b86..b5a70de5 100644
--- a/src/libsodium/Makefile.am
+++ b/src/libsodium/Makefile.am
@@ -40,6 +40,7 @@ libsodium_la_SOURCES = \
 	crypto_hashblocks/sha256/ref/api.h \
 	crypto_hashblocks/sha512/ref/blocks_sha512.c \
 	crypto_hashblocks/sha512/ref/api.h \
+	crypto_onetimeauth/crypto_onetimeauth.c \
 	crypto_onetimeauth/poly1305/onetimeauth_poly1305.c \
 	crypto_onetimeauth/poly1305/onetimeauth_poly1305_try.c \
 	crypto_onetimeauth/poly1305/53/api.h \
diff --git a/src/libsodium/crypto_onetimeauth/crypto_onetimeauth.c b/src/libsodium/crypto_onetimeauth/crypto_onetimeauth.c
new file mode 100644
index 00000000..19c6e71b
--- /dev/null
+++ b/src/libsodium/crypto_onetimeauth/crypto_onetimeauth.c
@@ -0,0 +1,34 @@
+
+#include "crypto_onetimeauth.h"
+
+size_t
+crypto_onetimeauth_bytes(void)
+{
+    return crypto_onetimeauth_BYTES;
+}
+
+size_t
+crypto_onetimeauth_keybytes(void)
+{
+    return crypto_onetimeauth_KEYBYTES;
+}
+
+const char *
+crypto_onetimeauth_primitive(void)
+{
+    return crypto_onetimeauth_PRIMITIVE;
+}
+
+int
+crypto_onetimeauth(unsigned char *out, const unsigned char *in,
+                   unsigned long long inlen, const unsigned char *k)
+{
+    return crypto_onetimeauth_poly1305(out, in, inlen, k);
+}
+
+int
+crypto_onetimeauth_verify(const unsigned char *h, const unsigned char *in,
+                          unsigned long long inlen, const unsigned char *k)
+{
+    return crypto_onetimeauth_poly1305_verify(h, in, inlen, k);
+}
diff --git a/src/libsodium/include/sodium/crypto_onetimeauth.h b/src/libsodium/include/sodium/crypto_onetimeauth.h
index 65c0fd3b..b8d40bec 100644
--- a/src/libsodium/include/sodium/crypto_onetimeauth.h
+++ b/src/libsodium/include/sodium/crypto_onetimeauth.h
@@ -1,13 +1,37 @@
 #ifndef crypto_onetimeauth_H
 #define crypto_onetimeauth_H
 
+#include <stdlib.h>
+
 #include "crypto_onetimeauth_poly1305.h"
 #include "export.h"
 
-#define crypto_onetimeauth crypto_onetimeauth_poly1305
-#define crypto_onetimeauth_verify crypto_onetimeauth_poly1305_verify
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #define crypto_onetimeauth_BYTES crypto_onetimeauth_poly1305_BYTES
+SODIUM_EXPORT
+size_t  crypto_onetimeauth_bytes(void);
+
 #define crypto_onetimeauth_KEYBYTES crypto_onetimeauth_poly1305_KEYBYTES
+SODIUM_EXPORT
+size_t  crypto_onetimeauth_keybytes(void);
+
 #define crypto_onetimeauth_PRIMITIVE "poly1305"
+SODIUM_EXPORT
+const char *crypto_onetimeauth_primitive(void);
+
+SODIUM_EXPORT
+int crypto_onetimeauth(unsigned char *out, const unsigned char *in,
+                       unsigned long long inlen, const unsigned char *k);
+
+SODIUM_EXPORT
+int crypto_onetimeauth_verify(const unsigned char *h, const unsigned char *in,
+                              unsigned long long inlen, const unsigned char *k);
+
+#ifdef __cplusplus
+}
+#endif
 
 #endif