diff --git a/src/compat.c b/src/compat.c
index 1290f70..34ffdaf 100644
--- a/src/compat.c
+++ b/src/compat.c
@@ -2,10 +2,11 @@
 #include "compat.h"
 
 #if LUA_VERSION_NUM==501
+
 /*
 ** Adapted from Lua 5.2
 */
-LUASOCKET_PRIVATE void luaL_setfuncs (lua_State *L, const luaL_Reg *l, int nup) {
+void luasocket_setfuncs (lua_State *L, const luaL_Reg *l, int nup) {
   luaL_checkstack(L, nup+1, "too many upvalues");
   for (; l->name != NULL; l++) {  /* fill the table with given functions */
     int i;
@@ -21,7 +22,7 @@ LUASOCKET_PRIVATE void luaL_setfuncs (lua_State *L, const luaL_Reg *l, int nup)
 /*
 ** Duplicated from Lua 5.2
 */
-LUASOCKET_PRIVATE void *luaL_testudata (lua_State *L, int ud, const char *tname) {
+void *luasocket_testudata (lua_State *L, int ud, const char *tname) {
   void *p = lua_touserdata(L, ud);
   if (p != NULL) {  /* value is a userdata? */
     if (lua_getmetatable(L, ud)) {  /* does it have a metatable? */
diff --git a/src/compat.h b/src/compat.h
index 49e83f9..8c32b07 100644
--- a/src/compat.h
+++ b/src/compat.h
@@ -1,14 +1,18 @@
 #ifndef COMPAT_H
 #define COMPAT_H
 
-#include "lua.h"
-#include "lauxlib.h"
-
 #if LUA_VERSION_NUM==501
-#define luaL_setfuncs socket_setfuncs
-#define luaL_testudata socket_testudata
-void luaL_setfuncs (lua_State *L, const luaL_Reg *l, int nup);
-void *luaL_testudata ( lua_State *L, int arg, const char *tname);
+
+#pragma GCC visibility push(hidden)
+
+void luasocket_setfuncs (lua_State *L, const luaL_Reg *l, int nup);
+void *luasocket_testudata ( lua_State *L, int arg, const char *tname);
+
+#pragma GCC visibility pop
+
+#define luaL_setfuncs luasocket_setfuncs
+#define luaL_testudata luasocket_testudata
+
 #endif
 
 #endif