diff --git a/src/libsodium/include/sodium/export.h b/src/libsodium/include/sodium/export.h
new file mode 100644
index 00000000..1fcbaae8
--- /dev/null
+++ b/src/libsodium/include/sodium/export.h
@@ -0,0 +1,30 @@
+
+#ifndef __SODIUM_EXPORT_H__
+#define __SODIUM_EXPORT_H__
+
+#ifndef __GNUC__
+# ifdef __attribute__
+#  undef __attribute__
+# endif
+# define __attribute__(a)
+#endif
+
+#ifndef SODIUM_STATIC
+# if defined(_MSC_VER)
+#  ifdef DLL_EXPORT
+#   define SODIUM_EXPORT __declspec(dllexport)
+#  else
+#   define SODIUM_EXPORT __declspec(dllimport)
+#  endif
+# else
+#  if defined(__SUNPRO_C)
+#   define SODIUM_EXPORT __attribute__ __global
+#  elif defined(_MSG_VER)
+#   define SODIUM_EXPORT extern __declspec(dllexport)
+#  else
+#   define SODIUM_EXPORT __attribute__ ((visibility ("default")))
+#  endif
+# endif
+#endif
+
+#endif