1 files changed, 1 insertions, 0 deletions

diff --git a/src/compat.h b/src/compat.h
index 7a1fcee..2033aa3 100644
--- a/src/compat.h
+++ b/src/compat.h
@@ -6,6 +6,7 @@
 
 #if LUA_VERSION_NUM == 501
 void luaL_setfuncs(lua_State *L, const luaL_Reg *l, int nup);
+void *luaL_testudata(lua_State *L, int ud, const char *tname);
 #endif