2 files changed, 6 insertions, 0 deletions
diff --git a/src/mpack/lmpack.c b/src/mpack/lmpack.c
index 957bac37cc..8b45136cae 100644
--- a/src/mpack/lmpack.c
+++ b/src/mpack/lmpack.c
@@ -1171,6 +1171,9 @@ static const luaL_reg mpack_functions[] = {
   {NULL, NULL}
 };
 
+#ifdef NLUA_WIN32
+  __declspec(dllexport)
+#endif
 int luaopen_mpack(lua_State *L)
 {
   /* Unpacker */
diff --git a/src/mpack/lmpack.h b/src/mpack/lmpack.h
index e35f40fab6..84f786cc8f 100644
--- a/src/mpack/lmpack.h
+++ b/src/mpack/lmpack.h
@@ -1,3 +1,6 @@
 #include <lua.h>
 
+#ifdef NLUA_WIN32
+  __declspec(dllexport)
+#endif
 int luaopen_mpack(lua_State *L);